That is totally normal until he gets used to you handling him, especially when the surrounding has changed. The hard part is over, congrats. I haven't had the same luck with all my turtles. I can tell your turtle is lucky to have you. Happy Turtleing!!!!
Jeff
Ps. Also make sure you dont squeeze the little guy too hard, they can actually feel the pressure from your fingers. I found that some turtles wont thrash around unless you grab them a little tight. They also get used to being handled a lot faster. Dont get me wrong, dont drop the guy..LOL.
-----
Jeff M.
-----------------
1.2 tri-colored hogs
2.4 w.hogs
1.2 albino RES
2.4 spotted turtles
0.1 puppy
--->2.7 albino mice feeder breeding colony 