A jewish grandma is giving directions to her grown grandson who is coming to visit.
"You come into the building, with your elbow you open the door, I am in apartment 301. There is an intercom, with your elbow you push 301. I buzz you in.
The elevator is on the right, get in, and with your elbow push 3rd floor. When you get out, on the left, with your elbow, hit my doorbell."
"Ok Grandma, but why am I only using my elbow?"
"What?! You're coming empty handed?!"