Mark Webber: Valencia 2010
Really big accidents are becoming more rare as the years go by, but this one was a stark reminder of the dangers that still exist even in our modern F1.
Webber hit the back of Kovalainen's Lotus at almost 200mph and was launched into the air in a spectacular back flip, going so high that he wiped out an advertising hoarding and then landed upside down.
After a short slide, the car righted itself and Webber ended up hitting the barrier, still going at a fair rate of knots.
In-car view is at the end of the video, so you can appreciate quite what it felt like.