Talk about stupid questions. Any car made in the last 40 years or so can run forever without overheating, if properly maintained. I wouldn't own a car that couldn't be.

 

Alterego667 if you did indeed shut it off immediately after the hose popped
off it should not have had enough time to over heat and cause any damage.

 

Oh wow, I've never seen the needle move that far. Two days ago, when the temperature in LA first reached +100°F, mine creeped (two tally marks) close to the middle while my A/C was on. I was at a stop when all of a sudden, the engine just shut off. That was the first time that happened. I pushed the car to the side and left the key in the ON position to let the fans run, which only turns on for 10-15 seconds if I remove the key. Restarted after half an hour then drove home. Coolant level was about half an inch over the high marker and oil is at the middle; checked CELs last night and they were P0300, P0506, and P2259. Gonna see if I can take care of the first two this afternoon.

 

Strange thread to bump for your question.

But yeah, you could have done damage to the engine.

There no way to really tell until it fails.
A compression test would be useful.