There are many reasons for my enthusiasm for automatic doors, perhaps I will go into those later, but I have been pleased to find many great examples of the genre in Bristol. There is an enormous soulless expanse of mall called Cribb's Causeway that is just coming down with the things.
Here's quite a nice one:
This is a detail from the same door.
If that's not a metaphor for fragile human mortality trapped within a runaway machine driven ecological nightmare then I don't know what is.