Selfish Snowball
When you're doing her on top and she has her legs under you and just as you jizz, she goes "KIAT" and flips you over her and onto the floor upside down. Your jizz travels down to pool on your face.
I was having makeup sex with my girl last night when she suddenly flipped me over at the moment of climax and I ended up doing a selfish snowball, I guess she's still mad.