Biggest waste of money you've witnessed?

I'm usually an impulsive non-buyer. I go to the store with a list, and talk myself out of 3/4 of it.

I don't understand how people can spend so much money on luxury things. Things like huge-screen tv's and stuff. Maybe I'm just too practical for my own good. I found it hard to spend money on a digital camera even, because I just couldn't see myself needing it. It took me two weeks to talk myself into getting it for the simple reasoning of wanting it. Buying my laptop was a neccesity in many ways. Communication, school, hobbies etc. So paying 1200 for my laptop wasn't a major waste in my eyes. I got something really good, with a great warranty and a few great accessories. But I've seen people buy shitloads of things that they'll never need. I don't know, I just hate seeing people spend all their hard earned money on things they don't really need.

Jam it back in, in the dark.