The Hoff -- Prelude to 911?

11/28/2009 7:29 AM PST
TMZ has learned an ambulance was called to the home of David Hasselhoff on Friday -- and this video might give us a glimpse as to why.

The Hoff -- who has been battling problems with alcohol for years -- arrived at LAX on Wednesday looking ... well, like he enjoyed the flight. His driver got into it with the freelance photog who took the video -- but The Hoff just kept grinning and saying, "It's all good."

Just two days later, an ambulance was called to his home and someone -- local fire department wouldn't confirm who -- was transported to the hospital. Coincidence?

We reached out to David's people -- never heard back.