its because dan said: "im a super fan"
there is a skit on saturday night live where this group of fat chicago-ites sit around and and talk about how good all the sports teams in chicago are. and they call themselves the superfans.
and they would say DAAAAAA... and then the team name. So for example they would all raise their beers and toast DAAAAAAA BULLS.
its strange american humor. This poster does indeed kick ass though.
i don't get the chicago accent thing...think this is my favourite poster i've done for a while, it's all assembled on the photocopy making little bits of text real big and sticking it all on. thanks for the comments