Leeches!
"They will bleed you dry!"
When a crop of doped-up athletes from the Lakecrest College swim team dive into the campus lake to blow off some steam, the bloodsucking leeches below the surface undergo a stunning transformation. After ingesting small amounts of the swimmers' steroid-laced blood, the slimy creatures grow to unusual sizes and set out to sink their teeth into an unsuspecting student population.
Directors: David DeCoteau
Writers: David DeCoteau, Gary Barkin, Michael Gingold
Cast
Homepage: http://www.rapidheart.com/leeches-and-speed-demon/
IMDB: tt0339288