It probably is just because you were a bit nervous and your legs stiffened up. Practice makes perfect. Try flipping in a lake or slow moving water several times. If you can get into your boat...you can always get out. My playboat is only 5'9" long and I am 5'5" tall. I really have to squeeze to get in, but never have had a problem when I've needed to get out. It will become easier over time. Don't give up!!!
