I've seen a number of horror films where people get offed in bizarre ways by things in the tub. I think my favorite was the snowman rape from Jack Frost, but this clip isn't bad.

In terms of bathtub murders, it's like part Evilspeak, part Cabin Fever, with a dash of Final Destination and Troma production values. Wouldn't be in my Top Five, but I can appreciate what they were going for.