by Squirrelous » October 7th, 2009, 12:08 pm
The heavy heartbeat is due to your body not being used to hypnotic trance, but trance is a natural condition, so don't worry. The spasms are because your nerves aren't used to the idea of faking a feeling (aka growing fur).
With repetition you'll get used to it. It might be easier practicing on a less extreme file to get used to trance, aka calming the heavy heartbeat. Curse CCP comes to mind.