Those pesky prehistoric piranhas migrate from Lake Victoria to The Big Wet Water Park in this crass, gross and witless sequel to the 2010 hit. Misfiring on all cylinders, as an ironic ode to 70s sleaze, director John Gulager (Feast) begins with a gaseous cow corpse excreting fish eggs, setting the tone for an insulting, juvenile, soft-core sex-obsessed carnival of splatter. This includes vomit spray, gushers of blood and endless piranhas biting sensitive body parts. Meanwhile, Danielle Panabaker is the concerned park co-owner whose venal stepfather has roped off one swimming pool for adult fun (aqua strippers and nude candid camera antics) and wavers between the hot corrupt cop and sensitive nerd for boyfriend material. "Welcome to rock bottom", says David Hasselhoff, reduced to badly emulating his role in Baywatch. He never spoke a truer word.