“I ran a couple of marathons. Best time was 2:59:12.”

— Chris Francisco, math professor, Stillwater, Okla.

“I swam across the Potomac River because it was there.”

— Jay Schweig, math professor, Washington, D.C.

“I jumped off a cliff into the water in Hawaii. I went feet first instead of head first. It was about a 40-foot cliff.”

— Greg Biberstein, pediatrician, Manhattan

“Zip lining in Puerto Vallarta, Mexico. It was the world's fastest zip line, I believe, 75 miles per hour. It was pretty fun.”

— Katie Ruggles, elementary education graduate, Centennial, Colo.