Laughquake 

1. Deriving from the verb to laugh. It is the act to move the body in an uncontrolled and unintentionally way due to a heavy laugh.

2. The vibration supplied from your body due to laughing, in somehow implement the vibration of a building due to an earthquake.

1. This morning I had a laughquake because of how skyler was sleeping in class (so that other people can hear and see).
2. It was so funny that she had a laughquake!

Laughquake by Gambero December 10, 2012

lagquake 

The rapid sideways movement experienced during lag in first person shooters.

Shit, that was a fucking huge lagquake.

lagquake by Scienceman123 January 17, 2008