<s>[INST] Clovis is biking down a mountainous road with an elevation range of 1000 feet. He is wearing his favorite yellow jersey and, despite the perilous mountain roads, is feeling quite optimistic about his chances in the upcoming Tour de France. As he flies down the mountain at top speed, he comes across a series of three tunnels that he must navigate through. Upon entering the first tunnel, and without warning, his brakes fail. Both clothes and cherry pits are blown backwards. What force is responsible for the blowback of the clothes and the cherry pits?[/INST]