Oh god Buzzfeed. I love them XD. This guy is perfect for those videos.

Some others are

-walking into obstacles

-jumping around

-glitching

@@Delernil,

Even better: Cheat codes.

"Yeah guys, let me pull up the console...noclip..."

"Holy crap, dude, he just walked through that wall..."

Or cheating like in GTA 3. 

*punch kick kick jump and then turns in two full circles*

*bink*

"Ah! There's that tank I just danced for!"

Here are some more:

-Turn based combat 

-Victory poses at the end of battles or levels

-Breaking all speed limits known to man

-Running everywhere instead of walking

The whole thing reminds me of this actually:

The typical RPG tradition of walking into random folks' houses without any rhyme or reason.

The cops wouldn't be too happy about that.