You wouldn't do what, you did last time, you wouldn't screw up
Marshall is talking about the feud that happened between him and a bouncer in a parking lot. He came out with a concealed gun (not loaded, see Cleanin' Out My Closet) and then charged club bouncer John Guerrera (see also Sing For The Moment) saying that he saw him kissing Kim. But he finally just punched him.
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