Plaion Throw the mom off the train

Owen Lift (Danny DeVito) suffers greatly under his tyrannical mother. Inspired by Hitchcock's idea in Strangers on a Train, he seeks and finds a fellow sufferer in Larry Donner (Billy Crystal), who would like to be rid of his ex-wife once and for all. The deal is quickly sealed: Owen will kill Larry's wife, and in return, Larry will eliminate Owen's mother. While Larry is still plagued by guilt, Owen, favored by fate, takes care of his part of the agreement. Now it's Mama's turn...