Swimming Questions, Please Answer!!!?

Answers to numbers 2, 6, and 7: 2) It doesn't hurt to open your eyes under water. It just feels weird. 6) If you land wrong (on your belly, , knees, etc.) then it does feel like concrete. If you do a proper dive then it won't hurt at all. 7) It is very possible and fun to do everything you described above. Actually, they're very fun to do!