Have a look here:
http://www.24hdubai.com/?page=511
for a code 60 on the first (yes FIRST!) lap of this years Dubai 24hr. The incident is shown at 12:30 in, the code 60 flag is shown at a couple of posts, then the green at 13:08 in. Interesting that some drivers don't respond to the green and lose places, but then the code 60 had been out for some time as major armco repairs were needed.