Its going to feel like your going faster than you're cranking, so that will throw you off. Just practice. I still remember being happy I did a full circle, now I don't really F-up until 2 or 3. I was doing some really good ones once, the most I've ever done and this guy walks up to me and starts asking me questions. I thought he was being a ******, but he was actually really interested in how my bike could possibly go backwards.