When you undergo gastric bypass surgery, NEVER TRUST A FART -- and Al Roker learned that lesson the hard way ... at the White House.
Roker -- who got his stomach stapled in March 2002 -- shared his most embarrassing moment on "Dateline" last night, saying he was covering an event at 1600 Pennsylvania Ave a month after his operation ... when he felt the urge to let one rip.
Roker said, "I probably went off and ate something I wasn't supposed to. And as I'm walking to the press room, [I'm thinking] well, I gotta pass a little gas here. I'm walking by myself. Who's gonna know? Only a little something extra came out. I pooped my pants."
Roker said he beelined for the restroom to dump his underwear in the trash -- and proceeded to go commando the rest of the day.
The lesson: watch what you eat. The other lesson: carry spare underpants.
Reminds me of the guy who landed aboard the carrier and proceeded to strip at the deck edge and throw his undies and flight suit over the side into the ocean.
