Actually, Dean Cain got more lines (and more screen time) than any of the other participants. His was the loudly shouted "Yeah!" as the action begins (accompanied by a close-up of his face), then he has a line about how awesome (or words to that effect
) the military trainers are, then there's a shot of him treading water in his military gear, and finally his line about the danger factor. Of the 8 celebrities, he and the woman who said she's in awe of the military men and then said "yes, there is [crying in the military]" are the only two who had more than one line.