Absence of feeling

The majority of Wing Chun is to not let outside forces affect you. You should maintain the little idea state and ignore external forces. To put this another way, if you are doing it right, you shouldn't feel anything...

For example, during Chi Sao when you roll up Bong Sao you do not need to feel anything. The opponents force should simply roll off you.

When you first experience it it is a very spooky feeling. This in itself can be enough to stop you doing it. You expect to feel something where as you should just complete the movement with your 'little idea.'

A highly addictive feeling or lack there of...