She Shrugged as he looked her over wanting to know what she was doing out here.  "It was time to move on from my previous place.  I know of a few places around here likely to have a few supplies, with as fast as this thing hit, I am betting the looting was kept to a minimum."  She said. Her eyes widened with worry as he said he needed a minute before sinking to the sidewalk.  

She leaned over him and rested a hand on his shoulder.  "Deep breath, sounds like the air might have gotten knocked out of you..  Just breathe deeply and it will pass."  She crouched down so she could make eye contact.  "Feeling a little dizzy?"  She wanted to know as she slid her hand down his arm to monitor his pulse.  "Don't rush, and don't try to talk, just nod."  She glanced down at her watch monitoring his heart rate.  "Have you been short on rations?  drinking enough water?"  she asked.   


It was likely that the physical exertion with lack of food or water was leaving him far more exhausted than normal.  If that wasn't the case, it was likely the adrenaline.  If you weren't used to it, it could really play hell on your system as the rush vanished.