I love how holodecks lacked an Oh Shit button. What's an Oh Shit button? It's a big red button on a piece of dangerous machinery that kills the power and stops everything. When something goes wrong and you say "Oh Shit!" and not the button. I literally trained people thus way. It's a convenient way to associateb the use of the button with the purpose for it.

Imagine how much safer (and less interesting the shows) would be if you could just run to the door, flip the little lid, and smack the big red button to kill the power to the stupid thing.