I've always wonder WTF this is Its in the basement at Zombie Hall (I think that's still its urbex name).
Well I can solve this ‘mystery’ quite easily. It’s clearly some propane tanks sprayed silver (see the graffiti can in the background) with a mop handle taped to the side, strapped to a naff attempt at a wooden chair for that famous ‘spooky urbex shot’ that’s ever so common nowadays, or, as @albino-jay put it, a wank prop. Mystery solved.