 However problems have now arisen, when Hiro and Ando prepare to infiltrate Building 26, Hiro's powers falter and he instead receives a blistering headache and a nosebleed.After the two rescue all of the evolved humans, Mohinder states that for some reason Hiro's body is now rejecting his powers and he can't risk freezing time again.Hiro does it one more time to save Noah Bennet from Danko, but it proves to be too much of a strain on him and causes him to pass out.