(starts at 3:27 in case the video URL didn't copy right)
In summary, he comes up with the idea to counter when Triple H imitated him during the Nation and Corporation parodies.
The Rock loves it, so they go to Cokeboy.
Triple H, Steph and DX were already in the office so the Rock goes through the promo with everyone and asks Brian to do the impersonation pretty much throwing him under the bus. Brian is like
"no, you should do it Rock since it's your promo."But Rock talks him into doing it in front of Triple H so he does it, Triple H is sitting there like
while Cokeboy is 
and the rest of DX is like 