how did Vince win the WWF Championship?

[The Naitch]

what was that aboot

[The One]

Stone Cold (who was in the middle with one of the best fueds of the later 90's with HHH) came in and stunned Hunter and threw McMahon's limp body over Triple H. It was just so shocking to see Austin side with McMahon to get back at HHH...it made everything very powerful.

[Y3J]

He pinned the then champion. I think that's how most title changes occur.

[Xero]

Stone Cold (who was in the middle with one of the best fueds of the later 90's with HHH) came in and stunned Hunter and threw McMahon's limp body over Triple H. It was just so shocking to see Austin side with McMahon to get back at HHH...it made everything very powerful.
You know, I never realized it, but a lot of people (including myself) always thought of Austin first siding with McMahon at Mania 17. Sure, I KNEW he sided with McMahon during his championship time, but I never really saw it as SIDING with McMahon until X7.