If they see it, if they even care, if someone's curiosity/nosiness steps up, tell them you are learning to tie knots for when your sailboat arrives next week. Or you have decided to learn how to rope livestock. Go into an elaborate explanation about how you line up chairs, how twirling a big lasso broke your celing fan (Oops!). Then laugh, roll your eyes, and walk away. If they haven't already left.
Actually, if someone asks you a question, your best response may be, "Why do you ask?" Then shut up. Most people will be embarassed, make an excuse and leave.