[subtik]

a rabbit hole?

[jaclaz]

Cited from Matrix:

http://www.imdb.com/title/tt0133093/quotes?item=qt0324307

which cites Lewis Carrol's Alice in Wonderland:

http://www.urbandictionary.com/define.php?term=Rabbit%20Hole

[jonathansizz]

serendipity.