Thresh definitely hat that 'this is all a dream and will go away soon' look down pat and was letting it fly free. From being mistaken as someone named Boyd who had been a werewolf, to finding himself the ward of Effie Trinket, complete with welcome home banner and smiles that reminded him deep down of his time at the Capitol.
To be honest, he was just a little overwhelmed.
Like for instance, having the freedom to eat whatever he wanted and not get whipped by the Peacekeepers for it. Having the ability to walk into a place like Hinkles and buy food anytime he wanted. It was all surreal.
Almost as surreal as the guy snarfing down a tray of burgers. He was drawing a crowd, as well, Thresh included. Watching the guy with neither horror or amusement, maybe awe? Thresh shook himself out of his thoughts and back to the here and now as the guy spoke to him. "Me?" Right, was there any other massive seventeen year old boy around? He was practically towering over the majority of the crowd. "I.. I guess?"