My mouse worries me.
Don't get me wrong, it's great to use.
I bought it to help avoid RSI and it seems to have done the trick.

It glows all the time.
When the PC is shut down it stays alive, staring like a miniature HAL.
That never used to bother me.
But last week I awoke late at night, thinking I'd heard something.
I got out of bed and walked through to the living room.

The mouse was glowing brightly... and projecting an episode of Family Fortunes.
I managed to calm myself and grab a decent photo before it flickered and disappeared.

I have an identical mouse at work.
So far it has failed to exhibit any manifestations of Les Dennis.