Update!
Well, it's time to whip out the camera!
Me and Duder are home alone and were sitting on the couch watching the TV. Suddenly I hear this sound from across the house, like somebody pounded their fist on a window. She asks, "did you hear that?" I told her I had and to mute the TV. So we're there listening and then we hear a single tap on the same window. I was honestly convinced somebody was outside our house, so we grab a gun and check it out. Nothing inside, nothing outside.
When I get back in the house, she says "Oh...my...god" and describes to me a "glittery orb". It sounds much like the one I saw, only I never told her about what I saw. Another case of independent discovery.
We sit back down to watch TV and Duder goes to the bathroom, which is near where we heard the sounds on the window. She comes back walking very cautiously and asks, "were you on the couch the whole time?" I say that I have, and she can't believe it. She says somebody walked up to the bathroom door, put something on the ground, and touched the door handle.
I'm keeping the gun around just in the unlikely case these "spooks" are actually thieves or something or another. The sound comes from the opposite side of the house no matter where we go. If we're in the back, it's in the front, if we're in the front...
As well, this sounds lame, but it's apparently afraid of light! If we leave the light on in the hallway and shut the door to our rooms, the sounds STOP and NEVER manifest!
Odd, but now that I know this, I'm leaving the lights OFF when I leave the cameras up.
As well I've got 2 friends that are going to spend the night to experience some of these things, and now I realize...this is fun. No really, this is a game, we have been up this the whole time laughing about our individual occurances and I'm starting to think that these spooks liven the place up...like...the aurora or something.
Another Update: Haha, all of us heard a woman speaking in the hall. I said, "somebody left a TV on". OH NO THEY DI'NT! All four of us heard it too! Haha. I'll keep you posted.