The player is able to stand up when swimming through a one-block high gap, the player can stand up even though there is a block above.
The name tag will visually appear lower than usually and in the first-person view it still looks like the player was still swimming, but when in third-person mode (or as seen by another player) you see that the player is actually standing. If you sneak, the first-person view will jump up inside the block above.
If the block above the player is solid (in the example: the red glass block), the player will suffocate when sneaking (if in survival mode) and won't be able to leave the block it is in without destroying any blocks.
- Build this:
- Go into the water and start swimming
- Swim into the one-block high gap
- Touch the ground or press Space without pressing Ctrl