Donkeys years ago, it may have been in the Guinness Book of Records for 1966, somebody described a bit of a cruel experiment with processionary moth caterpillars. They diverted a procession onto the rim of a bucket, and when the leader completed the loop and hit the followers, the procession was broken - so there was a circular procession on the bucket rim. As I recall, it kept going for a few days before they all died.
Do be careful of the caterpillars' hairs - they are irritant and allergen.