You can exploit the /back plugin (when you die you go back to the place you died) so that you teleport above the bedrock in The Nether

What I expected to happen was...:

The player should teleport to the nearest platform under the bedrock

What actually happened was...:

The player teleports to the bedrock layer because the player can't teleport into lava

Steps to Reproduce:
1. Find a ceiling close to the upper bedrock platform

2. There must be lava beneath the player
3. Fly into a corner in the ceiling with elytra with rockets and die
4. Write the /back command

5. The player is now above the bedrock layer