The first construction workers says, "I swear to god if my wife packed me another bologna sandwich I'm going to kill my self by jumping off this roof." He opens his lunch and there is a bologna sandwich. He goes and jumps off the roof.
The second construction worker says, "If my wife packed me cold pizza for lunch again I'm going to kill my self by jumping off this roof." He opens his lunch and there's cold pizza. He goes and jumps off the roof.
The third construction worker says to himself, "If my wife packed me a fish sandwich I too will jump off this roof and kill my self." He opens his lunch and there is a fish sandwich. He follows suite and jumps off and kills himself.
Later on the three wives meet at the cemetery after the funerals.
The wife of the first construction worker says while crying, "If only I would have packed him a turkey sandwich he would still be here with me."
The wife of the second construction worker is also crying. "If only I would have packed him meatloaf instead he would still be here."
The third wife is just standing there looking frustrated with a more confused look. The other two look at her and ask her why she isn't crying and wishing she packed his lunch a different way.
"Don't look at me the dumbass packs his own lunch."
