Nice, very cool professor.
I missed one class for a trip to WDW a few years ago, and my professor told me that I'd have to still turn in the assignment that was due at the class I was missing. No problem, I completed it on the plane, and upon arrival at my resort, went to stick it in the already stamped and addressed envelope that I brought from home. Only problem was, I couldn't find the envelope. No problem, went to the front desk and asked for a business sized envelope. They gave me a letterhead envelope with "The Walt Disney Company" as the return address. Mailed off my assignment, no problem, enjoyed the rest of my vacation, etc.
Fast forward to the following week's class, when the professor is handing back the assignments, and feels the need to show the entire class the envelope I used to mail him the assignment, and teased me about wanting to make sure he knew I was at WDW and not just blowing off class. Everyone thought it was pretty funny, but it made me blush!