(informal) pride comes before a fall

Alternative spelling of qui fait le malin tombe dans le ravin

lightning never strikes twice in the same place

to fall / to come down / to bump into, to come across; to be received by (when making a telephone call) / to become, to get

to hit a snag, to find a fly in the ointment

to break down (to fail)

second-person plural imperative of tomber

(transitive) to physically drop (an object) / (transitive, figuratively) to drop, to forget about, to leave; to give up

third-person plural present indicative/subjunctive of tomber

first-person singular future of tomber