Boards
It'd be funny if there was an open top bus
full of bald topless men with beer bellies holding pints of lager and doing football chants and rioting and stuff and like shouting and fighting with each other and every now and then you just see it drive past with no idea who they are but you just hear it approaching really loud pure hooligan rabble. Starts off like a distant racket and then they drive past all pointing at you YOU'RE SHIT AND YOU KNOW YOU ARE WHO YOU FACKIN' LOOKIN AT YOU FACKIN CANT! etc.
There's a sketch about something else and then you see it drive past in the background and hear the noise faintly and it's like a recurring theme, just drives past all the time in the background of things and you see all their bald heads and pint glasses and fighting and stuff