Well I wouldn't want to do that to him. I nearly gave a fainting goat a heart attack and felt horrible. I do not want to know how badly I'd feel inflicting one upon your father.
Rory has suggested keycards for a locking mechanism on the elevator and I am working on that right away. None of us should have to accidentally see the other in action as it were. You are also on the very short list now of people I do not wish to see in that manner.