To perform a dynamic entry, one must come out of absolutely nowhere into a given situation and spontaneously kick one or more persons' asses. The attack may or may not contain massive amounts of gar (the polar opposite of gay), but a dynamic entry - especially in real life - always generates extreme lulz.
Josh: *opens front door*
Doug: DYNAMIC ENTRY!!!1 *actually manages to kick Josh's ass*
Josiah: Hey, asshole, you're late by like half an hour. Where the f#ck where you?
Doug: Beating off.