Go to the part where Xander is snow skiing down the side of a mountain. Right before he goes over a drop-off, he comes to a stop. He then unzips his jacket and takes out two little detonator bombs, sets them, and throws them behind him. Then Xander, without zipping his jacket back up, jumps off the drop-off and begins to ski again. But it shows his jacket zipped up when he is skiing. When did he zip up his jacket?