Something bad or unexpected can happen when people send up a self-controlled flying machine like a drone without knowing how to really control it.

当人们在不知道如何真正控制它的情况下发射一个像无人机一样的自我控制飞行机器时，可能会发生一些糟糕或意想不到的事情。

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The Reaper was flying a combat mission when operators lost "positive control" of the UAV, or the ability to establish connections and send control inputs to the remote-controlled aircraft.

“收获者”执行飞行作战任务时，导航员既失去了对无人机的“实际控制”，也不能与遥控飞机建立联系并发送控制输入信号。

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Even worse, even a minor crash with another flying car could send both vehicles plummeting to the ground while you scream in terror.

更糟的是，即使一次与飞车的轻微碰撞，都可能让两辆车直落地面，而你只能惊恐地在车里大叫。

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Collisions with other cars can send you flying and if you have the game set for realistic damage, it can also end your race.

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