I think he expected some complaining along the lines of "This is too hard, and I'm tired".
I'm paying good money to do things that I don't want to do and wouldn't struggle to push myself to do unless someone is standing over me watching. Why would I complain??
Whenever I watch Biggest Loser I get so irritated at the whining that they do. Do they want to be fat forever? Suck it up people. Suck. It. Up.