What's the worst speaker or stereo set-up you've ever seen?

Two, decades ago.

A San Francisco audio system with Quads in a largely glass room. The apartment was high-end and striking visually, but the stereo sounded horrible.

At the Stereophile show in Miami in 1991, B&W was debuting their Nautilus line with something like $500,000 of Krell amplification (maybe tri-amped)? So loud and hard was the sound that I left after 15 seconds.

I was demoing two of the most popular products mentioned on this site paired together.  A very expensive ($5K+) pair of stand mounts and a popular Chinese manufactured tube amp.  
They were poorly matched and I am sure can sound good with other equipment.  The shocking part was when I asked the retailer why it sounded so bad he said it was because “my music sucked”.  He then payed some obscure music that sounded good.  I informed him I wasn’t planning on changing my listening tastes so I could have the pro ledge of owning these products.  
Shockingly, I didn’t buy either item.  

A very high end dealer in NYC and another high but not quite as high dealer in North Jersey.

Both setups were probably defective.

I heard new Wharfdale Linton Heritage speakers on the bundled stands last week. Not sure about that. Sound was tizzy and just weird. Very disappointed.  A very mid fi A/v amp was used.   Maybe that. 

I know a guy who shall remain nameless, and I know this is hard to believe, but he has a whole bunch of speakers just spread willy-nilly around the room and that's not all, they are pointed at the wall. A total schemozzle.