I can't believe he actually did this!
Apparently Bekah and Nathan don't realize that, for all intents and purposes, a caterpillar is technically a b-u-g. If they knew that, the last thing they would be doing would be to let it crawl all over themselves -- they would be running the other direction in a state of panic that would take a few mild sedatives to calm down. Let's not tell them, k? :)