This was originally placed to coincide with hosting my first event, celebrating reaching the milestone of 1,000 cache finds. GC71X06 relates to the event. If you didn't make it, then look out for '2,000 And Counting'!
The cache was published an hour before the event to give the early birds something to fight about. Now, it remains as a simple drive-by cache, although I hope it is something you won't have seen before.