I wonder what might be linked to triggering 'banshee alter' apart from bagpipes?

let me do a 'banshee search' on youtube....

well, there's this...bones....gill's nickname had been 'skull' after all:

https://www.youtube.com/watch?v=UfWBX0roDZA

I reckon we're looking at 'mr bean' programming here:

and then there's this:

https://www.youtube.com/watch?v=0cUb3zWJ7Ys