I was abseiling to the start of the climb. Not knowing the crab or climb, I wasn’t sure whether to stop on a ledge or keep going. I pulled some rope through the belay device so I could move along the ledge to assess it, but quickly decided I had to keep going. I pulled the rope back through and stepped off the ledge, but hadn’t weighted the rope, didn’t think, so there was of course some slack in the rope, I had already abseiled about 25m, so I started falling. Grabbed the rope, burnt my hands, let go of the rope, and landed in an undignified heap at the bottom, about 2m further down. Thankfully my prussic had worked, and there wasn’t enough slack for me to hit the ground hard, I just sort of sat down. Ended up with 2nd degree rope burns on both hands.