He is trying to tell this people not as smart as him to pay attention and listen to him. If they don’t, they’ll end up in the next dimension, or the afterlife.

Mouse traps capture and kill mice but snapping back to get the mouse stuck in the trap, and it has to do it fast so the mice do not get out. But Passionate MC can cock back even quicker then a mouse trap. Impressive

He is off the hook, as in he is crazy, but he is still performing his rap on the record.
The hook is also the chorus of the song, so a bit of wordplay here.

Danimal is way ahead of his time, and because of this he has wisdom that many others do not have.

X-Phaze is still new to the rap game and fairly unknown, so people give him no credit for his music and call him stupid, but they do think his raps are cool as shit

To be fluent with something means that you are able to express yourself easily and articulately.

To be fluent with a flow means that his flow his flawless and goes over the beat perfectly.

A lieutenant is a very high ranking soldier in the military. In this case, X-Phaze is known as lieutenant lunatic for his crazy raps.

He is going hard on this track, so hard that he had a heart attack and even worse there is no hospital that can help him.

He can snap peoples backs with his music, without a hat. Wordplay here, with him snapping backs as the type of hat known as the snap back.