Specifically, in the office or similar, usually by some doting brain dead idiot:
"Someone help me, my PCs blown up". Errr, no it hasn't. No smoke. No impaling of legs with shards of molten metal and processor. No 'fizz-bang' that usually accompanies an actual explosion. Your computer just stopped working. That's why it's off. With no power. Sitting there. Quietly.
"My car blew up". Wow!? Really? You're lucky to be alive etc etc. Oh no, wait. It didn't blow up, you broke down. Disappointment reigns.