Q: How can you recognize a DEC field circus engineer with a flat tire? A: He's changing one tire at a time to see which one is flat. Q: How can you recognize a DEC field circus engineer who is out of gas? A: He's changing one tire at a time to see which one is flat.[See Easter egging for additional insight on these jokes.]
There is also the `Field Circus Cheer' (from the plan file for DEC on MIT-AI):
Maynard! Maynard! Don't mess with us! We're mean and we're tough! If you get us confused We'll screw up your stuff.(DEC's service HQ is located in Maynard, Massachusetts.)