Bryan played an obnoxious heel a couple of years back where he would often win matches under slightly dubious circumstances/with some slice of luck but would still do the over the top yes chant as though he won it by himself. Was in a feud with Sheamus for the WHC which led to a match at WM 28. The crowd had lots of Brryan fans and they were all looking forward to what would've been a great match. Unfortunately Sheamus pinned him in 18 seconds.
The next night on Raw, the crowd was
very vocal with the yes chants and just took over the whole show with "Daniel Bryan" and yes chants, even though he wasn't even on the show. The fans loved Bryan and were pissed he wasn't given any time on the Wrestlemania card and voiced their support. Eventually the support for Bryan got so ridiculous that he was given a WWE championship match vs John Cena at Summerslam, where he pinned Cena. Clean. However HHH (who was the guest referee) pedigreed Bryan after the match allowing Orton to cash in MITB. This started the whole "Orton is the face of the WWE, you're small and average" etc etc.
Bryan was then weirdly phased out of the WWE title picture despite being
by far the most popular wrestler on the roster. It all got out of hand when in a Raw segment where HHH was trying to hype a Cena vs Orton (
) and had guys like HBK, Bret Hart, Cm Punk, etc. in the ring to make it feel epic, and all the crowd was doing was chant for Bryan. They completely and utterly hijacked the segment and HHH couldn't even continue talking without acknowledging kchants