A person is in goon mode with respect to a material element of an offense when, acting without regard for anyone else's opinion and/or approval, he/she consciously disregards all material risks of his/her actions, especially those directed at third parties. While acting in goon mode involves a gross deviation from the standard of care that a reasonable person would observe in the actor's situation, those in goon mode are respected by both friend and foe alike for their inspiring display of utmost vigor and determination.
You are at the bar and you're in goon mode, You don't know or care what people think about you. you are feeling the groove, grinding on some females and taking shot after shot. You run the bar/party that night. Goon mode makes everything possible. You are fearless.
Or in relation to sexual acts....during goon mode you're pounding pussy like a stone, licking pussy like a professional, sucking cock with the same skill as a porn star or dancing on a cock as your riding it.