I have had to literally pry each talon out of my skin, one at a time with my free hand. Should this happen to you, you can try and rotate your hand so the hawk thinks it is falling. If he thinks he is falling, he will unbind and fly off. However, if the hawk is totally pissed, he will squeeze harder and do nothing but flap his wings. Either way, it is painful and is to be avoided at all costs.
All birds seek higher ground.
If your walking along, the hawk WILL fly off your fist and land on whatever high surface that's available. Be aware of this. If you have a hawk inside the house, he will fly and land on the curtains. You can put your chin on their head, kiss their backs. They may on occasion, turn around, then they will see you and react, but if you put your chin on their head, they will not always react.