I had an idea for a minor glyph and it won't get out of my head until I put it here. I am so sorry.
Glyph of the Overly-Attached Ghoul-Friend
While your ghoul is unsummoned and you are out of combat, your ghoul has a chance [1% per second, 1min ICD] of summoning itself to make sure you are okay and don't need it. [30 second duration, has the same name as your most recent ghoul, disappears if you enter combat, does not affect actual ghoul CD]. Upon checking up on you, it has a small chance [1% per summon] of giving you a gift. [Gift is a Dead Critter (Random Variant, possibly including very rare capturable battle pets to mock you) that is Soulbound and cannot be vendored]. Does not function in instances, raids, arenas, or battlegrounds.
Bracketed stuff is explanation and would not be mentioned in the glyph itself.
Come on, it's no sillier than the Harrison Jones part of Uldum. Although that is a pretty low bar...