Helicopter pilot leaving cockpit  

Happens all the time in utility. Type of aircraft plays a big part In how smart it is. Take precautions and realize there is a time and a place to do it. If it ever goes wrong it's a hard thing to justify. It's hard on the aircraft to be shutting down and starting up every 15 min. My general rule is anything over 20min I'm shutting down and won't restart until it's below starting temps. (unless it's a very bad place if it won't restart) If I got out, I got back in asap after doing whatever I got out for.