I DO NOT Condone this Exscuse & you could also be Liable for some pretty big penalty's if caught with two job's going like so! But Try the a Family Member has Just Died or grab a nice big rock and lamp your wrist or ankle (Not good if you intend on joining the Mil!) other than that Honesty is the best and just tell him it's because you feel threatened by his agressiveness I'd be annoyed if my staff didn't have the Kahona's to tell me that!