fall down on

verb4

1. •
   To collapse so that the remains are on top of.

   • There is a support in the middle of this passageway to make sure the ceiling doesn't fall down on us. — 2012
2. •
   To stumble or unintentionally descend and land on

   • We started doing tug of war for the banana, and, eventually, the monkey yanked it out of my hands, making me fall down on my back on the ground. — 2012
3. •
   To fail at or leave incomplete.

   • He would rather put a dent in his bankroll than fall down on anything he started. — 2013
4. •
   To prostrate oneself in a position that rests on

   • I would fall down on my knees and I besought God to heal my heart and to forgive my iniquity. — 2006