Complex sentence: The next day, Ben and LaWanda are about to get married, but just before he can say "I do", Trixie irrumpts with a tractor over which she has carried the Rock of love.
Split into simpler sentences: The next day, Ben and LaWanda are about to get married. However, just before he can say "I do", Trixie uses a tractor over which she has carried the Rock of Love.