Worst gadget flops of all time?

Train Wreck

Alright, punks, it's time to dig deep and spit out your nominations for the worst gadget flops of all time (and we promise we're not just doing this because it's been a slow news week, either). We're defining "worst" and "gadget" and "flop" pretty broadly, so all we're asking is that if you nominate something you include a couple of sentences explaining why your choice is especially worthy of disdain. We'll take the best entries and put 'em together as a feature next week, cool?