What can you do to scare someone?

To scare your boyfriend when he just moves in with you... 1-Put a crib in the spare bedroom, then stare at it from time to time. 2-Turn off the light,then call on the telephone using your phone without letting your boyfriend seeing you. then pretend your scare to make it more affective.3-When the room is so dark and your boyfriend doesnt see anything slowly get out of the room without your boyfriend noticing.. more affective: if you have a rat put it in a jar then when the room is dark pretend your scared then first hold your boyfriend's hand then take your hands off then get the rat out of the jar then slowly hold your boyfriends hand then slowly releasing your hand