What I learned from watching this movie (spoilers)
(Before I start, let me say I liked this movie, the actors are all great, Dina Meyer is fantastic, and I'm just joking.)
Things I learned;
Even when she's playing Lara Croft, Dina Meyer is still totally awesome.
If you want the monster to have a big fight with the two heroes then he must change into a man and just knock them out ... however everyone else he can instantly kill while in the guise of the sphinx.
This movie is apparantly better than the 1977 movie "Riddles of the Sphinx", according to comments in the IMDB.
If you're in a protected underground complex and you need to take a jet to travel around the world to exotic locations and enter other dimenions while being chased by a flying indestructable monster, it's a good idea to take your 16 year old daugher along with you. (Let's face it, you'll need her.)
If you've managed to visit several dimensions and outrun the monster by working as a team with your resourceful 16 year old daughter and your sexy gun-toting ex-girlfriend, then right at the end of the movie you should leave them and go to face the monster alone ... after all they'll both be suddenly crying, as they are only girls after all.
The traitor will turn out to be the only other main character in the movie, who happens to wear black and acts like a jerk all the time.
You can't get an internet connection while you're in an alternate universe ... the signal is too weak.
(I'm not going near the 'getting naked and sending your child to therapy' aspect.)