1.9 Commands

Command #1:

/summon Cow ~ ~1 ~ {IsChickenJockey:1,Passengers:[{id:"Zombie",IsVillager:0,IsBaby:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:10,Duration:200000,ShowParticles:0b}],Passengers:[{id:"Creeper",Silent:1,ActiveEffects:[{Id:14,Amplifier:10,Duration:200000,ShowParticles:0b}]}]}]}

or

/summon Chicken ~ ~1 ~ {IsChickenJockey:1,Passengers:[{id:"Zombie",IsVillager:0,IsBaby:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:10,Duration:200000,ShowParticles:0b}],Passengers:[{id:"Creeper",Silent:1,ActiveEffects:[{Id:14,Amplifier:10,Duration:200000,ShowParticles:0b}]}]}]}

etc

Command #2:

/gamerule randomTickSpeed 1000

In command block:

/execute @a ~ ~ ~ fill ~-5 ~-5 ~-5 ~5 ~5 ~5 chorus_flower 0 replace chorus_flower 5

Make sure this command block is on ALWAYS ACTIVE and REPEAT mode.

Command #3:

/effect @a levitation 10000 252 true
/effect @a jump_boost 10000 4 true

Command #4:

First type in chat:
/scoreboard objectives add Flying stat.aviateOneCm

Then place an ALWAYS ACTIVE and REPEAT mode command block with the command (FACING UP):
execute @e[score_Flying_min=1] ~ ~ ~ /summon Silverfish ~ ~ ~ {CustomName:"Fly",Size:0,Silent:1,ActiveEffects:[{Id:14,Amplifier:10,Duration:200000,ShowParticles:0b}]}
Then place an ALWAYS ACTIVE and CHAIN mode command block with the command (FACING UP):
scoreboard players set @a Flying 0
Then place an ALWAYS ACTIVE and CHAIN mode command block with the command (FACING UP):
tp @e[type=Silverfish,name=Fly] ~ ~-1000 ~

Command #5:

Just place a boat on Ice and weeeeeeeeeeeeeeeeeeeee