This was the first Queen song I ever heard, back in 1992 when it had a resurgence due to Wayne's World. We used to tape the music videos and re-watch them a lot.
I was only 6-7 at the time, so I disliked the song at first, because it was so strange, and it felt like the longest song ever (and was probably the longest song I'd ever heard at the time). But I also felt strangely compelled to watch it again, and after a few more listens, I loved it. The music video was every bit as iconic as the song too.
Anyone ever checked out the full 24 track multitrack for Bohemian Rhapsody? It's even more nuts than you'd expect. The intro a capella is 15 tracks of just vocals, and a lot of those are bounced down with multiple voices, all perfect of course. The middle section is equally crazy, and even with 24 tracks, they were pushing what they could do at the time with that album.
Then at the end on one of the tracks, you hear some faint voices, the most recognizable part being someone saying "Deacon crashing about" followed by Freddy Mercury saying "OH FUCK IT".