Complex sentence: Butch dances with Tom's girlfriend while on a beach ball, while Tom builds a sand pit and throws Butch into it, but Butch then pulls Tom into the pit in return.
Split into simpler sentences: Butch dances with Tom's girlfriend while on a beach ball, but Tom builds a sand pit and throws Butch into it. Tom dances with his girlfriend, but Butch then pulls Tom into the pit in return.