Has anyone else experienced bruising on velocicoaster?

I went on for the first time last night and woke up with the backs of my knees a little sore but didnt know why… until I went back on again this morning and the bruising lined up directly with the edge of my seat on velocicoaster. Love the ride to death and didnt let it stop me from going back to back again this morning. I havent seen anyone mention this before, has anyone else experienced this?