The star was being honoured at the Creative Coalition Spotlight Awards at the Sundance Film Festival on Sunday (22Jan12) when he reportedly collapsed outside the Park City venue.
Morgan was taken to a nearby hospital for treatment and his representative later blamed the incident on exhaustion and altitude sickness.
And the comedian is wasting no time in getting back to work, assuring fans he has made a full recovery and is already back on his feet, insisting he's planning to return to New York and resume shooting his hit TV show 30 Rock on Tuesday (24Jan12).
In a series of posts on his Twitter.com account on Monday (23Jan12), he writes, "Thank U 2 the hospital staff. Back at work 2morrow shooting 30 Rock. Holla at me! Superman ran into a little kryptonite. The high altitude in Utah shook up this kid from Brooklyn."