Get the Diamond Gem!

[Cybertails1998]

i somehow fuse Cortex Command with Minecraft, and blast your head open with HPoM sniper rifle.

Then grab the gem.

[Ad Bot]

[Celtic Wolf]

I dress up as a pretty girl and get him to give me the diamond in the form of an engagement ring. Then I strangle him with my wig.

[Medicat]

I use a bottle of beer to trade.
Then hit him with the diamond and take the beer :3

[Ector]

I'd use my fishing rod to throw him off a cliff.

[LeeroyBlockhead]

I make a creeper hold a fishing rod and go and connect two rods, the creeper pulling his as I get away with the diamond, and disappear, along with the diamond, instantly.

[kanew2000]

Look at me.

Now look at your diamond.
Now back at me.
Now back at your diamond.
The diamond is now a lit block of tnt.
Now look back at me.
I have your diamond.

I'm on a ghast.

Flying away.

[rockslide26]

build an adminium jail around him when he goes AFK. Then, threaten to kill him if he won't give me the diamond.

[luluthe42nd]

1.Use hax to instantly mine more diamond and make homing bow.
2.Explosive arrows.
3.???
4.Profit

[TheArmyGuy]

Me being all hardcore , I catch your explosive arrow with my teeth , swallow it and it explodes harmlessly in my titanium stomach. I then pull your bow towards me with my unnatural mind and chew it up into biths of diamond , because my teeth are made of material stronger than diamond.
I take the 2 diamonds from the bow and eat the diamonds for breakfast.
I get the third one.