please help me figure out this horror movie okay this is just the only thing i remembered!
--- the killer puts his victims on a somewhat like tombs i think they're a group of friends (as usual, group of friends for horror movies) then there's this girl who soon awakens then the killer hears that somebody's still alive, the girl learns that they are put inside this whatever tub or what.... then her boyfriend is still alive too he sacrificed himself because the killer thought it was the girl who's still alive (and yes the girl's still alive) but to save his girlfriend he manages to scream so that he'll be the one to be killed by the killer thus saving his girlfriend
---- i watched it like 5 years ago or more, that scene was just thrilling WHAT'S THIS MOVIE PLEASE!