Affects Version/s: Minecraft 18w20b, Minecraft 18w20c, Minecraft 18w21a, Minecraft 18w21b
Fix Version/s: Minecraft 18w22a
Surprisingly this wasn't reported yet after a quick search.
- Place a single sea pickle on the floor under a two block high gap.
- Walk up to it.
- Place another sea pickle into it to increase the stack.
Your head is now inside the block above.
Performing this with turtle eggs allows you to walk through the eggs, see