This is one of many reasons why parking maneuvers should be performed slowly. I once turned into a space to park only to encounter a woman on the other side of her housewife panzer tank. The only reason I didn't hit her was that I was going about 5 miles per hour the entire time, so when she came into view I could just put my foot on the brake and stop gently.

Contrast this with drivers I've seen who will haul ass into a parking space at 15 MPH and then brake immediately.