The accident happened on Sunday when the American leader was munching on a pretzel - a popular savoury snack in the US.
'Watching American football'
He apparently did not swallow his food properly, which slowed down his heart rate and caused him to faint and fall off his sofa.
George Bush was on his own watching American football at the time.
He passed out for a few seconds, then woke up and called for White House medical staff.