- while they are sleeping draw tally marks all over them
- get a recording of the noise of the TARDIS, play it when you’re around them and watch their reaction
- put pictures of weeping angels everywhere and underneath write “an image of an angel becomes an angel”
- draw cracks in their bedroom wall
- tell them that you keep hearing druming in your head, and constantly tap on everything you’re around
- tell them that you’re using some new diet pills and that they’re really great.
- whenever you go over to their house knock four times