Everybody has considered just how hilarious it would be to try to make a large purchase with nothing but coinage at a young age. Luckily, by the time most people have enough resources to actually make a large purchase, they've realized that paying for a new, high-end computer in nickels is annoying as hell, and will rightfully get one's punk-ass ignored by a cashier.
A man in China brought the equivalent of $16,000 in coins, weighing five tons, to pay for his new ride. Amazingly, the dealer didn't call him whatever the Chinese words for "annoying fist-bait" are, and proceeded to take the payment. About halfway through counting all of the small change the buyer got bored and agreed to pay for the second half of the car with his credit card.