I was gathering light bulbs in the caves, when I suddenly got disconnected from my world. When I rejoined, my inventory had completely changed for some reason. I had been wearing a floral shirt and football helmet, with only a lantern, miner hat, and some light bulbs in my inventory before the disconnect. When I reconnected, my floral shirt was missing, and I got a bunch of things in my inventory that weren't there before.
1. Enter sinkhole.
2. Gather light bulbs.