Harry stood back, letting Theo work without comment. As each spell failed to open the door, Harry grew more and more frustrated. As if there wasn't enough to deal with.
Finally one of the spells seemed to make the door shudder. The water had seemed to speed up, and was pooling around their knees, failing to escape beneath the door or down the drain. It was cold, too. "What was that one?" he asked quickly, lifting his wand and watching Nott so he could replicate it. At this point, he didn't care if the door went to splinters, as long as they got out.