He has absolutely no idea what to do with this at first. He wonders if he should be offended by all the laughing until Tony explains it. He can instantly relate. After all, the stuff he took for his various illnesses made him act funny more than once. "It's really me and this isn't a dream. I held onto your card." Like that explains everything. Steve realizes his mistake and just skips to the point. "Sorry, I shouldn't have dropped in like this. I'll let you go. Just wanted to wish you luck with your recovery. Give me a call if you're ever in DC." He lingers for what he expects to be a completely incoherent reply.