I once caused the house pro at the local bowling alley to almost panic. I write and do some other things left-handed, but I bowl right-handed. I was having him drill out a new ball for me. For those who aren't familiar with the finer aspects of bowling and always use the house balls.....bowling balls are like eyeglasses in that they are custom-fitted for the individual, with careful measurements being made of the diameter of the fingers, the span of the hand, and the balls are drilled differently according to whether the person is right or left-handed.
He had just finished drilling out my ball and had me write up something, I forget exactly what, and almost crapped himself when he saw me filling out the paper with the pen in my left hand, since he had just finished measuring my right hand and drilling out the ball accordingly.
In the old days of paper score sheets it was quite convenient, as I could leave my wrist braces in place and still handle a pencil to fill in the score sheet.