I found this via Top Gear's twitter page, but I thought it was funny enough to share here. Apparently this Mustang has been tuned to make 800hp, however, when the dyno begins its run, the engine abruptly blows up with a small amount of flames and loads of smoke.

I'm not very mechanically inclined so perhaps someone can enlighten us on perhaps what exactly happened? I don't know if it could be from over-stressing the engine with the extra tuning, but I would have to think that played a role.

Here is a link to the article. I couldn't get the video to embed, sorry.