the german was sitting beside the window when he heard someone yelling from outside:Look out!He thought that something might be happening outside,so he reached out his head and looked aroud.Suddenly,a bucket of water poured on his head and he was all wet.The german was so angry and asked the man who just yelled"look out","Look what you have done!Why did you ask me to look out?"
The man answered with surprise," don't you understand that look out means be careful?