My youngest chinchilla Pebble has earned the nickname 'cute stupid' from my husband. The most recent silly thing he did involved trying to lay down behind Trinity and pop corning at the same time. You could tell he was sleepy but he just kept randomly twitching until Trin finally klacked at him for waking her up. After a quick dash around the cage he finally settled down to snooze.
Oh I just remember something he did when they were first introduced. He was so excited to see a female (yet scared of her cause she is large) that he would run up, pounce on her for a few seconds and run away... Only he didnt know where to aim, one time he ended up on her face leaving behind a present. Poor Trin just stood their looking very confused till I got her dust bath out. I think I laughed over that one for days.