The E.R. star narrated the 50th anniversary of the candlelight procession at Californian theme park Disneyland earlier this month (Dec08).
But the festivities were put on hold when a choir member singing at the event fainted - leaving revellers stunned and prompting Stamos to rush into the stands, reports People magazine.
Catching the woman in his arms, Stamos joked, "Stop fainting, I'm not a real doctor!"
Source: WENN