Dear of troy: you remind me of having a girl who sat behind me having a wood tick drop onto her desk where I could slip a sheet of paper under it. I turned around, let the paper sag in the middle, then pulled the ends, and catapaulted the tick right onto paper teacher was writing on.
Her agitation and revulsion were so extreme I really had trouble keeping a straight face. Fortunately she had no idea who had done it. I'm sure she thought it was a louse.