You just got to be looking around all the time to make sure you are not going to be run down.

你随时观察四周以确保你不会被撞倒。

伦敦的蓝色自行车 - SpeakingMax英语口语达人

That was not really a wall apparently because it toppled over

很明显，那不是真的墙，因为它被撞倒了，

在工作室发生的事 - SpeakingMax英语口语达人