Ha! We wonder if this was a tongue-in-cheek nod to that nitwit Bella character she plays, or if this is actually what she wanted!
A source reveals:
"Rob was so excited for Kristen, and they each took turns riding it. Kristen learned to ride a dirt bike in 'New Moon' so they thought it would be appropriate. Rob was supervising as she sat on it to make sure she was OK. They looked like they were having a great time, and it will be something they can really enjoy!"
Oh man! That's a pretty cool gift, if we do say so, ourselves!
Just be safe on that thing, you two!
You don't have the luxury of a film crew and stunt doubles to ensure that you don't hurt yourselves this time around!
And happy birthday to you, once again, gurl!