At the start of writer-director Joby Harold’s feature debut, we learn that every year, one in 700 people wake up during surgery. The prospect is scary enough on its own. Harold resourcefully goes one step ahead by having his wealthy captain of industry protagonist, Clayton Beresford Jr (Hayden Christensen), find himself still awake, paralysed and unable to communicate after having been anaesthetised for a heart transplant operation.

Harold has come up with an ingenious, tense and surprisingly entertaining graft of medical melodrama and out-and-out suspense thriller. Of course it is preposterous but it works remarkably well at keeping you watching to see what happens next.