Scratches

Lately my whole family has had to live with scratches on their hands. They have taught me to step on their hand with the command "Come on" and step off again when they say "Down". I understand those commands very well and try to obey them, but I am a bit clumsy still. Sometimes I loose my balance and grab their wrist as tight as I can, and with my long sharp nails I scratch them at those moments. Sorry, family. I don't do it on purpose.