“Roboshark” (*1/2 out of four) was a toothless Redbox horror thriller about a great white in the Pacific who swallows a UFO aircraft and is turned into a deadly robot//shark hybrid and soon there’s blood in the waters. Potentially fun thriller is sunk by a silly plot that becomes increasingly cornball and dumb and some horrendous acting that really has to be seen to be believed. The shark does look cool though. Watch “Jaws” (or even “Jaws 4”) again instead.