I got this add too when I cleared my cookies and had to log in again. The greatest part is that it actually got stuck on the last frame, which was a giant explosion and would not let me click anything on the screen. Nothing, this Giant Bomb site experience was just a giant explosion on the screen.
So this awesome ad, which completely filled my screen (I was on a tablet to be fair), thus ACTIVELY KEPT ME FROM USING THE SITE.
Awesome. It's almost worst than that Meebo bar thing.