He's got a bulging gut and midsection.
Looks to be too far gone IMO.
I don't see this guy pulling off a vacuum shot anytime soon, sorry.
-Hedge
Vacuums are so pre-90s Hedge. That was an era of Aesthetics being on par with muscularity, upper bodies overshadowing legs etc. We're now in an era of mass and freakishness. Nearly every damn competitor has a gut. It's only a case of who can hold it in the longest. Anyone who can pull a vacuum is conferred freak status that's talked about for 5 mins, before the talk turns to the mass monsters with the least offensive aesthetics.
People who keep singing the 'bring back the old days of glory' themesong need to move on. Change is a part of life and will happen regardless of your approval. You either move on or get left behind.
Zac Khan has a small waist and crazy thickness. Maybe it's unrealistic for us to expect guys competing over 280 lbs on a 6 foot frame or shorter to pull a vacuum.