John Grahl (ya mutu a shekara ta 2009), wanda kuma ake kira Waterproof, ya kasance ɗan wasan barkwanci kuma ɗan wasan Ghana. Ya fito a cikin shirye-shirye da yawa kuma shine dan wasan barkwanci na farko a Ghana. "Meet Waterproof The First Stand-Up Comedian In Ghana". How Ghana (in Turanci). 2017-09-27. Retrieved 2019-10-13. Online, Peace FM. ""Water Proof" is Dead | General Entertainment | Peacefmonline.com". www.peacefmonline.com. Retrieved 2019-10-13. "Waterproof throws committee into laughter over passport | General News 1998-12-02". www.ghanaweb.com. Retrieved 2019-10-13. "Who Killed Waterproof?". Modern Ghana (in Turanci). Retrieved 2020-01-27.