re: anyone used the cheats yet on GTA V?

welp i had all intentions on starting fresh from beginning last night but ended up free roaming again. spawned a fighter helicopter and shot shite up with the machine gun and missles. Tried stealing a jet multiple times...FAIL. actually got in one and was about to take off and hit a dam barrel or something which caused me to go off track and hit a huge plane and explode
i have swam in the ocean
rode jet skis
stole a ski boat
tried stealing a sail boat but i was swimming and couldnt catch up
got attacked by a mountain lion
tried to find a shark, you get some sort of achievement when you get ate by a shark "in deep water i hear"