Cael- The Last Thing I Remember by Andrew Klavan

Charlie wakes up in a dark room and is strapped from head to toe in bars on a chair. There is a single light above him and he has to find a way to get out. There is still one question remaining... what is the last thing he remembers?
He thinks back to what he remember. Last night, he was playing  video games, and he had karate.
He wakes up and he remembers he has a karate card in his hand, and he can bust his way out... but a guy comes in with a syringe full of bubbly fluid.