Sorry, but he wasn't going to be sweating at all as he knew most of what he'd be asked and was already prepared with answers, even if they didn't make sense, which they didn't.
He said if he was going to cheat in Boston, why would he been seen in a photo running? Duh! He'd want to be seen running!!!!!!!!!!!! What an embarrassment. And Singer fell for that with no rebuttal? Sad journalism.
If the questions got too tough, which they didn't, he'd simply get up and leave. Jacket on or off didn't matter as many people do that in fast food restaurants, had nothing to do with sweating.