Engineer Humor

One morning 3 Engineers and 3 Geologists were in a ticket line at the train station.The 3 Geologists each bought a ticket and watched as the 3 Engineers bought just one ticket among them.
"How are the 3 of you going to travel on one 1 ticket?" asked one of the Geologists.
"Watch and learn" answered one of the Engineers.
When the 6 travelers boarded the train, the 3 Geologists sat down, but the 3 Engineers crammed into a bathroom together and closed the door.
Shortly after the train departed, the conductor came around to collect tickets. He knocked on the bathroom door and said, "tickets please." the door opened just a crack and a single arm emerged with a ticket in hand. The Conductor took it and moved on.
The Geologists saw this happen and agreed it was quite a clever idea. Indeed, so clever that they decided to do the same thing on the return trip and save some money.
That evening after the game when they got to the train station, they bought a single ticket for the return trip while to their astonishment the 3 Engineers didn't buy even 1 ticket.
"How are you going to travel without a ticket?" asked one of the perplexed Geologists.
"Watch and learn", answered one of the Engineers.
When they boarded the train the 3 Geologists crammed themselves into a bathroom and the 3 Engineers crammed themselves into the other bathroom across from it.
Shortly after the train began to move, one of the Engineers left their bathroom and walked quietly over to the Geologist's bathroom. He knocked on the door and said "ticket please".