Sudden actions (echarse a)

Sudden Actions with "Echarse a"

When you want to describe a sudden, spontaneous reaction—like bursting into laughter or taking off running—you can use the reflexive verb echarse followed by a and an infinitive verb.

to burst out / to start (sudden reaction)
echarse a

The formula is: [Reflexive pronoun] + echar (conjugated) + a + [infinitive]

Yesterday we saw a rat, so we took off running.
Ayer vimos una rata, así que nos echamos a correr.
The clown tripped and the girl burst out laughing.
El payaso tropezó y la chica se echó a reír.

Typical Reactions

Because echarse a emphasizes that an action was sudden, impulsive, or unexpected, it is mostly used with verbs of movement (like correr or volar) and emotional physical outbursts (like reír, llorar, temblar, or gritar).

The rat entered the house and the woman burst out crying.
La rata entró a la casa y la mujer se echó a llorar.
The actor let out a shriek when the cockroach started flying.
El actor soltó un chillido cuando la cucaracha se echó a volar.
The boss saw a cockroach on the floor, so he started trembling.
El jefe vio una cucaracha en el piso, por eso se echó a temblar.