 A scene only on the trailer for the movie involves Joe Pesci. When the cast  is being read in the end, when they announce his name we see him fooling with  a gun and it fires. He looks up with a "Oops" look on his face. If you own  the copy of LW4 that is available today this short scene can be seen during  an advertisment for the "Warner Bros. Century Collection" which runs before  the movie