It’s unbelievable.
Bah dum tsst
Couldn’t they get out of an entrance ?
It sounds like the Hotel California.
Got it. 
Sounds like a Tom Swifty:
“Those insects are trapped in their hive!”, Tom said unbelievingly.
Did you hear about the time Little Audrey backed into an electric fan?
Disaster!
If you run in front of a moving car, you’re going to be tired. But if you run after it, you’ll be exhausted.
Well, probably not if you’re driving.
Or feeling a bit run down.
Didja hear about the butcher who backed into his meat grinder?
He got a little behind in his work
There was an old Wizard of Id cartoon, in which the king was passing judgement on criminals.
“This peasant was caught plotting treason.”
“Behead him!”
“This peasant was caught stealing.”
“Behand him!”
“This peasant was caught mooning.”
“Behind him!”
Soldier, it would behoove you to shine those shoes!
If I’m behooved, I wouldn’t have much use for shoes.