hey, it's not too bad. i can keep going. i only have 24 hours of running to do. >> incredible. scott, thanks again so much. >> thanks for having me. >> tomorrow, more on extreme athletes with jennifer joe cobb. the fastest woman in nascar. that's "extreme living" with dr. sanjay gupta right here on "ac 360." if you thought you had a tough time today in the snow, imagine being stuck in the middle of an icy pond. we'll tell you the unusual way this cat was able to get back to shore. and muppet knows it's not easy being green. he'll share his secrets for keeping cool with the puppet from our rediculist tonight. [ female announcer ] in the grip of arthritis, back, or back joint pain?