When I last saw Porridge Radio, they had a big fancy set that woz like a 3D version of their last album cover, which I didn't really like as an album cover, but worked a bit better as a 3D floaty thing. Think the Beths had the big fish head off their album cover as well.
Also, when I were a kid I saw Iron Maiden playing at Leeds and they had like a big Eddie skull head thing coming out of the bottom of the stage and then a big brain came out of the top of the stage and went in the head and then its eyes went red. I've seen plenty of bands that I'd rate above Iron Maiden musically, but I don't think I've ever seen anyone else top that in terms of "having a big brain that goes into a big skull and then its eyes go red".
I quite like them stars they've got painted on the wall at the Brudenell, those are quite endearing.