I had a very unusual experience on Sunday。
It was a bright，sunny day。 Our school closed for the day。 And my friends and I swam together happily。
It was very interesting。 Then I went to the biggest and the deepest water area of the swimming pool。 Next a terrible thing happened。
You can imagine how strange it was。 My leg had a problem and I couldn"t swim。 I was very fearful。
It was very dangerous。 Then my friends swam to me and saved me。 He saved my life。
I was out of danger and my friend becomes my liberator。I said: "Thank you! Thank you very much!" My friends and I walked home together in silence。
This is my unusual experience。It"s very terrible。I couldn"t forget it。