Qualify from a round without falling over even once

Knock someone over

Qualify from a racing round despite falling over more than 10 times

Reach terminal velocity

Activate a multiplier on any pinball table.

Bounce 30 blocks upward off a Slime Block.

Build some bookshelves to improve your enchantment table.

Smelt wood trunks using charcoal to make more charcoal.

Spawn the Wither.

Construct a Dispenser.

Dye all 4 unique pieces of Leather Armor.

Craft and place a sign.