That's not a UFO, it's an ILO. ;-) It was a ULO until you correctly identified it. It may have been a UFO prior to its having landed, depends if anyone saw it and failed to identify it while it was still airborne. Sounds like your friend is one of those dummies who goes for National Enquirer type stories and crappy movies.

Now here I was, all interested, thinking you'd seen a genuine AFO or an ALO. Heh! Well, better luck next time, I guess.