I accidentally in your base

Getting into bed on Tuesday, Helen asks what the hell I've done to my back. I say 'Wut?'. She points out that my back is covered in bruising, and asks if I've been sneaking off for secret liasons with dommes for severe beatings. I saw 'Wut??'. She takes a photo with my phone:



I guess when I was learning backflying last week, I hit the mesh floor a bit harder than I realised each time I fell out of the air.