Refuelling was introduced in the 1982 by the Brabham team when they discovered they could start a race with half empty tanks stop to refuel and gain time by running a lighter car.

By 1984 however refuelling had been deemed unsafe and was banned.

It was reintroduced in 1994 however when a system was devised that was deemed safe enough to use in a pitlane packed with mechanics.

The system was not foolproof however as can be seen from the video. Thankfully no-one was injured in this incident.