“Nanoshark” (* out of four) was a brainless horror comedy about a group of none-too-bright scientists (Trevor Payer, Peter Whittaker, John N.E. Hill, and others) who use nanotechnology to shrink a shark which is then injected into people to cause a rare blood disorder; when this soon leads to problems, the scientists have to shrink themselves to enter the blood and try and kill the smallest shark ever. Outlandishly stupid premise might have been fun had it been played for high-camp and with flair and conviction but is crude and dumb all the way through. It’s movies like these that make you realize maybe “Jaws3 and 4” really weren’t as bad as we thought at the time.