¡Qué torpe! Se me cayó el vaso otra vez.

Literally, ¡Qué torpe! means something like How clumsy! or So clumsy!

Here, qué is used in an exclamation to intensify an adjective or noun. It often corresponds to English how or what a in exclamations.

Examples:

• ¡Qué bonito! = How lovely!
• ¡Qué pena! = What a shame!
• ¡Qué torpe! = How clumsy!

So the speaker is reacting emotionally, usually about themselves in this sentence.

Torpe is the normal form of the adjective and it does not change for masculine/feminine singular.

So:

• un chico torpe
• una chica torpe
• ¡Qué torpe!

Some Spanish adjectives change ending for gender, like alto / alta, but others stay the same, like:

• inteligente
• triste
• torpe

It does change for plural:

• torpes

Se me cayó el vaso is a very common Spanish way to say that something fell from your hands or that you dropped it, often with an accidental or unintended feeling.

A few important points:

• Caer means to fall
• caerse often means to fall / to drop / to fall down
• Se me cayó el vaso literally works like: The glass fell itself from me
• Natural English translation: I dropped the glass

Why not Caí el vaso?

• Because caer is not used like English drop with a direct object that way.
• Caí el vaso is not natural Spanish.

Why not Dejé caer el vaso?

• Dejé caer el vaso is also correct and means I let the glass fall / I dropped the glass
• But se me cayó el vaso is often more natural when it was accidental.

This is often called the accidental se or involuntary se.

It is used to present an action as something that happened unintentionally, often softening personal responsibility or simply describing an accident.

Compare:

• Rompí el vaso. = I broke the glass.
  This sounds more direct and agent-focused.
• Se me rompió el vaso. = The glass broke on me / I accidentally broke the glass.

In your sentence:

• Se me cayó el vaso = I accidentally dropped the glass / The glass fell from my hand

So se helps create that accidental-event structure.

Me shows who was affected or who the accident happened to.

So:

• Se me cayó el vaso = The glass fell on me / happened to me
• Natural English: I dropped the glass

You can change me for other people:

• Se te cayó el vaso. = You dropped the glass.
• Se le cayó el vaso. = He/She dropped the glass.
• Se nos cayó el vaso. = We dropped the glass.

This pronoun is a key part of the accidental construction.

Because grammatically, the subject is el vaso, not yo.

In Spanish, the verb agrees with the thing that fell:

• Se me cayó el vaso.
  Subject: el vaso → singular → cayó
• Se me cayeron los vasos.
  Subject: los vasos → plural → cayeron

Even though in English we say I dropped the glass, Spanish structures it more like:

• The glass fell on me

That is why the verb is cayó, not caí.

Spanish often uses the definite article (el, la, los, las) where English might use a possessive like my.

Since me already tells us who is involved, el vaso is usually enough.

So:

• Se me cayó el vaso is the normal way to say it.
• Se me cayó mi vaso is possible in some contexts, but usually unnecessary or less natural unless you specifically want to emphasize that it was my glass.

This is very common in Spanish with body parts and personal belongings:

• Me duele la cabeza = My head hurts
• Se me olvidó el móvil = I forgot my phone

Both otra vez and de nuevo can mean again.

In many situations they are interchangeable:

• Se me cayó el vaso otra vez
• Se me cayó el vaso de nuevo

But otra vez is usually more common in everyday speech.

Also, otra vez can sometimes carry a clearer sense of yet again or once again, especially when the speaker is annoyed:

• ¡Otra vez! = Again!

That makes it a very natural choice here, because the speaker sounds frustrated with themselves.

The first part is an emotional reaction, and the second part explains why.

• ¡Qué torpe! = self-criticism or frustration: How clumsy I am!
• Se me cayó el vaso otra vez. = the event: I dropped the glass again.

This kind of split is very natural in Spanish:

• ¡Qué horror! Perdí las llaves.
• ¡Qué vergüenza! Me equivoqué otra vez.

It makes the sentence sound expressive and conversational.

Yes, but it means something slightly different in tone.

• ¡Qué torpe! is an exclamation in the moment: How clumsy!
• Soy muy torpe. is a more neutral statement: I’m very clumsy.

In this context, after dropping a glass, ¡Qué torpe! sounds more natural because it is an immediate emotional reaction.

You could also hear:

• Qué torpe soy. = How clumsy I am.

That is also very natural.

Because this sentence refers to a completed event: the glass fell at a specific moment.

• Se me cayó el vaso = I dropped the glass / the glass fell
• Se me caía el vaso would suggest something ongoing, repeated, or about to happen, depending on context, and is much less likely here.

The preterite cayó is the normal choice for a single completed accident.

Compare:

• Se me cayó el vaso. = it happened
• Se me caía el vaso cuando intenté cogerlo. = it was slipping/falling from my hand when I tried to grab it

The structure se me cayó is common across the Spanish-speaking world, not just in Spain.

It is a very standard and widespread way to describe accidental events:

• Se me olvidó
• Se me perdió
• Se me rompió
• Se me cayó

What may vary a little is pronunciation or how often certain alternatives are used, but the grammar here is broadly standard Spanish.

So a learner of Spanish from Spain should absolutely know this pattern, and it will also be useful in Latin America.

In standard Peninsular Spanish, z is pronounced like the th in think.

So vez sounds approximately like beth.

And the whole phrase:

• otra vez ≈ OH-tra beth

In many parts of Latin America, z is pronounced like s, so it would sound more like bes instead. Both are correct in their respective varieties.