If you leave it out on your farm you'll eventually notice that something's broken out of it and following that you may notice, if you're sharp-eyed, a... thing? hiding on the dark corner of your screen at some point. I think I maybe noticed it at the edge of one of my maps at night in the dark after I got the Strange Capsule, but it's one of those things where you go: Did I? It's supposed to happen like that... I might have caught a glimpse... Was I using averted imagination?
Nahhh, it was probably just some celery.