要一篇英语作文。

An Unusual Experience
One day, I went to ski with my friend, Li Mei. We were playing happily on the ice when I heard a shout"Help". I turned back and was surprised to see a boy falling into a ice hole. But neither of us could swim. So Li Mei and I ran to ask for help. A few minutes later, a policeman came and pulled the boy out of the water. What an unusual experience it was!