Brains
When your owner has had insomnia for more than a week and has had about ten hours sleep in total during that time, why not, on the one night he is feeling tired keep him awake by making him hallucinate in the dimly lit bedroom. For extra shits and giggles make him hear noises and voices and the faint sound of a song he might know but cant quite guess.
(robneymcplum spiced up his life on, Tue 14 Jun 2011, 3:14, 2 replies, latest was 14 years ago)

or perhaps, when they just about get to sleep
Jerk their bodies so they wake up again

hours of fun
(Dan dan dan They tik urh jerbs!!!, Tue 14 Jun 2011, 10:05, Reply)

I forgot that
also, and this may just be me, make me let out a weird 'urgh' noise for no real reason that actually startles myself.
(robneymcplum spiced up his life on, Tue 14 Jun 2011, 13:20, Reply)