Elaine's Motel Ward

I went to the door and touched it lightly with my left hand. Elaine had spun another ward over the door, a subtle, solid crafting that would release enough kinetic energy to throw anyone who tried to open it a good ten or twelve feet away. It was perfect for a quick exit, if you were expecting trouble and ready for it when it arrived. Just wait for the bad guy to get bitch-slapped into the parking lot, then dash out the door and run off before he regained his feet.

White Night Chapter 24, Page 242