UPDATE: Natasha Richardson Severely Injured

UPDATE: It remains unclear exactly how sick Natasha Richardson is after yesterday's skiing accident, but it is believed that she has now been moved out of Canada.

E! News quotes a spokesperson from the hospital where she was being treated as saying, "I was informed by the family's rep…she has left Canada and the family should give out more information by tomorrow."

A family friend also told E! that the star is being flown back "home," which is believed to be New York City.

Details are starting to emerge about the ski accident that left Natasha Richardson with "critical" brain injuries.

Apparently her fall was pretty minor -- and it was only an hour or so later in the day that she realized something was badly wrong.

Liam Neeson's wife was taking a private ski lesson at about 3 p.m. on March 16 on a beginners' slope at Quebec’s Mont Tremblant resort.

Bloomberg is reporting that she stumbled and fell into soft, wet snow near the bottom of the slope.

The British actress's instructor called ski patrol, according to Entertainment Tonight, but at that point she had no apparent injuries.

In fact, TMZ reports that Natasha was smiling and joking with the patrol guys.

Apparently she refused to see a doctor and said she felt fine.

A source at the hotel has confirmed to ET that the instructor accompanied Natasha to her hotel room, and later on (TMZ says about one hour after the fall) she said she "wasn't feeling well and began complaining of headaches."