"the commander's prostration demoralized his men"
"the roof is in danger of collapse" "the collapse of the old star under its own gravity"
"he landed on the bed with a great flop"
"The wall collapsed" "The business collapsed" "The dam broke" "The roof collapsed" "The wall gave in" "The roof finally gave under the weight of the ice"
"fold up your umbrella" "collapse the music stand"
"the building crumbled after the explosion" "Negotiations broke down"
"The ice broke the pipe"
"The school system is collapsing" "The stock market collapsed"