Speaking of standing in the engine exhaust to keep warm here is a story you might find amusing.
While on my training program at Sikorsky I was assigned to work in the mod hangar where we were updating US Navy HSS-1s. All of the engines (Wright R-1820s) were pickled and pull off covers had been installed on the exhaust. One of the technicians had a part time job selling pistachios from his various vending machines. He started to bring the pistachios into work selling them in small bags to the technicians. Pretty soon the shells were covering the work floor. The Forman told the pistachio man that he didn’t mind him selling the nuts but if the shells were not disposed of in a proper manner he would no longer be able to sell the nuts on company property.
He passed the word to his customers and soon there were no shells to be seen. It was a month or so before the first aircraft completed the mod program and it was towed out to the flight line. The cover was removed from the exhaust and the engine was started. Because of the heavy preservative oil in the cylinders the pilot used a lot of priming fuel. When the engine caught it spewed a lot of hot preservative oil along with hundreds of pistachio shells. The fireguard that was not positioned properly got sprayed with hot preservative oil and he was covered in pistachio shells.
The Forman had all of the helos inspected and every exhaust stack was full of pistachio shells. Needless to say the man was restricted from selling any more on company property.