I worked at a Ford main dealer, in the parts department aged 16-20.
When I passed my test they sent me out delivering in a tranny van (great skive!) but one day it was in the garage for a service and I had to drive my bosses company car - Ford Capri 2.8i
He was running it in..... told me to go no faster than 45.
I was on a duel carriageway and got 120 out of it, loved it at the time but as soon as I said to myself ''that's enough, slow down'', I actually crapped myself as i could see how quickly I was passing trees and light posts.... I dare not brake and simply took my foot off the pedal and slowed it down.
Got back and my boss asked how fast i went. Told him no more than 45 and he said ''the exhaust looks a little white inside''. I just gave him a nod and a wink.