Summary:

Could diagonally go through a solid block with enough speed on both X and Z axis.

(etc. throwing a riptide 3 trident, flying with elytra, have very high level speed effect)

Steps to reproduce:

A easy reproduce method:

1.Build a 1 block wide pillar with any solid blocks.

2. /weather rain and get a riptide 3 trident.

3.Stand at the same position as in the video.

4.Facing at the same direction as in the video.

5.Throw the trident.

Observed Results:

You will go through the pillar.

Expected results:

You will collide with it.

Notes:

Affects any versions 1.8+(maybe earlier) in Java Edition.

Also affects Bedrock Edition.

Analysis:

This is because Minecraft don't detect collision directly, instead, the game detect collision on axes(Y→X→Z or Y→Z→X）, when your X and Z speed are both fast enough, the game will consider that you bypassed the block, so you "go through" the block.