Every punch that connected clean on Haney had him shook.I think Garcia proved that Haney's chin is shaky when faced with big punchers. It only takes one punch from Tank to turn the fight around to his favor.
Haney has been seriously rocked and/or dropped by both big punchers he has faced in his career (Linares and Ryan) The only reason he became undisputed was because he was emailed the WBC belt, then got lucky that light-punching gatekeeper-level Kambosos fluked his way into the remaining 3 belts Tank sparks him
Shakur yes, but Tank no. If he can't stand up to Kingry's hook, then he isn't withstanding Tank's best shots either.