joey mcknight, firefighter with mobile fire and rescue. my captain challenged me to the cold water challenge. >> firefighter joey mcknight taking the challenge. >> at least the fire department is there to save him. >> looks like he's chillin'. >> let's see how joey mcknight is doing. we have him via ske, right this minute. welcome to the show. are you still in the tub of ice? >> no, i'm not in the tub. i was in there like ten minutes. >> how long were you trying to stay in? >> long enough to get that video and to be honest tony wouldn't put the camera down fast enough because he likes to hear himself talk. >> trying to get his temperature down to 88. >> ended up being in there longer than i planned. >> how cold was it? >> i did not have a thermometer in there but it was really cold. >> shrinkage? >> yeah. my muscles, they were shrinking up pretty goodp. >> who were you donating the money to and the charity? how much do you donate if you submerge yourself in the water? >> i think it's up to us. most of us are doing half. mike challenged me