Throwing an ender pearl in Creative mode at a minecart/boat while sneaking will cause the minecart/boat to dissapear

Pistons are hard to remove when activated fast. Blocks below or behind will probably get destroyed earlier before the piston does.

Arrows can activate pressure plates when shooting between blocks.

If a boat is pushed into a minecart with a entity in it, it will continue going one direction without needing powered rails.

When a water is placed with a water bucket on a server, it has a chance to dissapear.

Enderman's eyes render white if you are looking straight at them.

Gold ingots show double in the crafting book.

Some block breaking particles are not affected by gravity