This guy shows off a quick and easy way to transform a popcorn ceiling into a smooth surface with only the help of a vacuum.

The tennis champ’s new snack, Cob, swaps corn for sorghum and joins a growing $3.5 billion popcorn market booming with celebrity investors.

Tennis champ Novak Djokovic, who led a $5 million seed round, is also joining the sorghum-based snack brand as a co-founder.