Knock Noise Under Pedals!! Help

xRUBOCOPx

dread head
I was driving yesterday...s2k gets next 2 me and slams it into 2 gear and takes off. I too slammed it into 2nd, and as soon as i let off the clutch and punched it, i heard a loud *CRACK*..so i put it in neutral and on the way home, every little bump i went over, i can feel and hear a knocking noise under my feet! Got home checked the mounts, axel, shocks, springs, torsion bar...and it looks all good!! WHAT THE HELL IS MAKING THE NOISE???
 
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