Trying out the new skateboard

Lukas got right to trying out his new skate board when we got home in the afternoon. He did pretty good for a first go at it. So we headed inside while he skated. Next thing I know he comes in crying. Mom: "Did you fall and hurt yourself?" Lukas: "Yes, I need one of these (pointing to his knee pad) for here (pointing to his bum)." Mom: "I believe that is called a pillow, they don't make pads for there."