It looks like you've pulled something in your own leg -a muscle, maybe? Who's the fool now?
看上去就像你在你自己腿上扯了什么东西——一块肌肉，也许吧？现在谁是傻瓜了？
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If your foot is pulled towards the rear of the bike, you risk running over your own leg, twisting your knee severely or smacking your ankle against the rear axle bolt.