It's not only NH jobs that have this problem.
I encounter this problem at the restaurant, parties, senior centers.

People come up to talk, and have to lean on the keyboard, especially the older folks that have to steady themselves. I just prepare myself by holding the keyboard to prevent an incident.

I had a keyboard friend get hit in the head with a speaker when it got knocked over. Fortunately he wasn't injured too badly, but it looked worse then it was because his aspirin therapy caused him to bleed. He was a good sport and wore a hard hat next time he played at the place.

Regards,

Jerryghr