Instantly I would set up bombs in the building I'm staying in. The bombs would be located in the ventilation system so when he inhaled the bombs he would die(if I set the switch). I would have a mask on sitting in the dining room playing on my phone while he swings on by. As soon as he makes contact with the building a super loud sound will go off while I get prepared. I will have a pistol and a knife on me while I wait. As soon as he gets inside he should already have inhaled the micro bombs so once I set the bombs off he will die. I will have speakers everywhere warning him of the bombs and come up to the room I am in. Once he opens the door I will aim my super cool pistol with a laser attached to it to show who is the man. I will laugh at his suffering while he stands in front of me looking miserable. I will force him to sit the fuck down at the table and look me in my eye while he sobs in anger, I will tell him to stay still for 23 more hours or I set the switch and he dies. The end.