Thus my wording

Legend has it, that some friends of mine where stoned at night and thought it was a good idea to drive with their car to the nearest burger place. When they past a roundabout they thought it would be funny to drive around it backwards in rear gear. What had to happen, happened: they crashed with another car going through the roundabout. Not much damage done luckily. Police comes and after some time, tells my friends they are free to go. Apparently the other driver was drunk as hell and swore that they drove backwards in the roundabout but the police didn’t believe a word he said, because he was so drunk.