When I was a maintenance mechanic at an amusement park the inside joke between us in that dept was "Is this ride open?"
The reason was customers would always ask us that while we were servicing a ride.
Had the transmission and transfer case on the ground beside the train ride it came out of.
Customer; Is this ride open?
Myself and another worker where wrestling a 200 pound gear box into place on a 'Tilt-a-whirl' its heavy and it's over 90 F on the Midway.
Customer interrupts us Is this ride open?
That time it took quite a bit of self control not to snap and tell the person what was ion my mind.
Bob