Send out an email to him about office etiquette but put in the subject "To all Employees". Make sure the email mentions using a headset because there are other people in the office. but ONLY send it to him, then send another one to just him 5 minutes later saying, "Whoops, it looks like you're the only one that received that company wide email, the Email server must have a filter on it to determine who actually needs each company wide sent email. weird...
I personally am surfing HBT waiting for the next Emergency "My Line is Down and it's costing us $1M an hour but we didn't want to spend 12G on a spare system just in case" call to come in. And kicking my self for forgetting the Rice hulls on 9#Flaked Wheat/2#White Wheat grain bill order for this weekend.