Rep. Trey Gowdy, R-S.C., is known for his unshakable resolve. His colleague, Rep. Sean Duffy, R-Wis., decided to test that resolve Thursday.

While Gowdy was responding to a question from Wolf Blitzer on CNN’s The Situation Room, Duffy walked by and flicked his ear. Gowdy didn’t react at all.

“Just had to check, and it’s confirmed: @TGowdySC has ice water in his veins- doesn’t even skip a beat,” Duffy later tweeted.

Gowdy did bat an eye, but only in the most literal sense, and no more than he’d been doing already.

The question put to Gowdy concerned FBI Director James Comey’s testimony before Congress earlier on Thursday.

h/t: gopthedailydose