I think there might be someone behind you right now.
You might just want to take a look.
What if everything you owned was one day replaced with an identical copy without you ever knowing about the switch?
Woah this is getting pretty edgy, oh no, we don't want that or else something bad might happen!
Oh crap I suddenly feeling like cutting myself oh god help me *stab stab squelch stabby noise*
And then the guy that was writing this died and a new guy took over.
The end.
Look behind you, and tell me what you see.