Subaru laments that he could not do anything or save anyone, and has no options left. Exhausted, he suddenly takes off running at full speed as if he's made a decision... To save Emilia, Subaru approaches Crusch to negotiate the formation of an alliance. His terms are a bit difficult for Crusch to believe, but she can see that Subaru isn't lying.
you'll get the rug pulled out from under ya.
تكون قد ارتكبت خطأ فادحاً
te van a jalar el tapete.
te van a comer por los pies.
finirai al tappeto senza neanche accorgertene.
você vai acabar 
sendo surpreendido.
Полагаться на других небезопасно.