This seems to be the new routine for bedtime. We got halfway up the stairs and we bump back down on our bums. Up and down, up and down, up and down until eventually I get fed up and just carry him upstairs! He has been fascinated by stairs since before he could walk and although I have tried to teach him to come downstairs backwards on hands and knees, he's having now of it. Much more fun to bump down on his bum!