now here's the thing

A phrase often used when trying to explain why something is, isn't, needs to be, or just in general. This phrase often talks about an invisible or nonexistent object or "thing." Will often cause anger or laughter.

Guy 2: Hey why do these things run away when I get close.

Guy 1: Now here's the thing David-

Guy 2: I swear to God if you say "Now here's the thing" one more time I will strangle you.

Guy 3, 4, 5, and 6: Enormous uproar of laughter.