They’re like little Easter eggs – when a player finds them, they feel happy.
Amanita Design finally admitted - their games are so ideal that they IMPLANT the bugs themselves
![Grin](http://amanita-design.net/forum/Smileys/default/grin.gif)
I can imagine them sitting on some discussion of ready game, with programmer:
"Mmm... so...maybe we shall put some bugs inside? For example, wrenches disappear..."