“ Saturday Night Live ” host Chris Rock returned to his old stomping grounds at Studio 8H and got a bloody warm welcome from Adam Sandler — his friend and fellow alum of the show — in a sketch this weekend. (You can watch Sandler’s surprise “SNL” return below)

Adam Sandler can't stop laughing through an "SNL" sketch filled with fake blood, in an episode hosted by his longtime friend Chris Rock.

Not even a series of prop failures and line flubs could keep this killer cameo from being laugh-out-loud funny.