Maybe the guy is embarrassed by letting rip in your delightful face and hopefully it was a once off occurance for your sake ! You could sneak into the elevator (Americanism just for you Dolls !) just before he arrives and put a No Farting sign in there for him to see . Light plenty of essence sticks and to be on the safe side , i recommend that you buy some nose clips just in case he blows when he blows if ya catch my drift