Worm grunting lures worms from the soil with just a vibrating stick

Back in my day, if the bait shop wasn't an option, you could always get some fishing worms by going grunting with a notched stick. The pros take it to the next level:

The Cadillac of prefab worm grunting for personal use is the Worm Gitter, demonstrated below by Duke:

Image: YouTube / Catfish and Carp