TFW you're tweaking the reverb on your virtual instrument, vascillating between "oh, yeah, that sounds better" and "I don't hear anything different," and then you try the little power light icon and realize that reverb has been turned off the whole time.
I don't know if you've used AmiAmi before, but when you place a pre-order, you don't need to pay it now, only when the product is available (they'll email you with the total cost including the shipping)