Same thing happened to me a few years back. Not having the honor of having served on the military, I was staring to get taken in by the bar talk. I was saved from further embarrasment by an ex-L.U.R.P. , who asked the guy if he had a S.E.A.L. tattoo? Sure enough, the fellow rolled up his sleeve and showed off the tattoo on his arm. The Vietnam Vet grabbed a butter knife and started scraping the guy's arm with it...., it started to blur....seems the guy drew it on in ink. Never saw him again.