I know a guy who was a bit of a prat and decided to 'finish off' his old DT50 by putting nos on it for a laugh, he got up to the usual 50mph or so and then activated the NOS, he reached about 92mph, most of which on the back wheel before there was a terrible noise and he ground to a halt with an orange glow from where the engine was, he then jumped off once he was going slow enough and ran as the bike went up in flames on the grass verge, apparently some major engine parts kind of, well, melted.
And that is no joke, 100% true as i saw it for myself. I just wish that video phones were the norm then, as that would have been true youtube gold!