Nosfer said:

I suspect the OnStar Roadside Assistance voice will be passed off as an EVP

ROFLMAO

I think you nailed it. 

Maybe the minivan's lights and alarm will briefly flash all by themselves too.. not like there's a small remote for that knd of thing …

okay, i'm gonna try my hand at predicting the future…..  quiet please! 

ooom oooom oooooom [a cow walking backwards]

i see…… grant walking into a room – and vanishing!  he will disappear for several hours, before mysteriously reappearing in the same room – stunned, cold, shaken and unable to speak.  he will be taken from the site wrapped in a blanket.

future episodes will show that grant can now channel spirits and he will regularly be posessed.  however, he will never tell anyone what happened to him when he 'passed through the veil' during those missing hours.

oh.  did it work?  did i predict anything?

I'd love to knock heads and compile a list of things that could be done to mess with them.

1) Laser in the windows..  a green laser pointer could be used from a mile away or more

3) (Would require entry prior to the invest)  plant a radio or walkie talkie in the ceiling or inside a wall, where once deposited, it can't really be gotten to-  extra points if in a location where the speaker audio bounces all around making it very difficult to pinpoint the exact source of the sound.  Transmit some choice spooky sounds while watching the show to determine if any team are in that vicinity.

2)  If access is possible right before TAPS shows up, a 160 minute tape player could do.. save the spooky audio for the very end of the tape.  Set to auto-reverse, and just let it play all night until it's batteries die.

4) With access to the perimeter of the building, this would mess with their heads bigtime :

http://en.wikipedia.org/wiki/Sound_from_ultrasound

5) (Recent prior access) -  leave some dry ice simply sitting in a nook or hole in the wall in a hallway.. as it starts to sublimate, it leaves a dense fog and once used up, no clue where it came from.

6) Any transmitter type device to mess with the K2

Any other ideas?  This could be fun!

They're going to try a new gimmick this year: 

Whenever their EMF meters go off on the live show, they're going to invite TV viewers to hold their own EMF meters up to the TV in order to verify and share in the reading.

lol..  okay, I'm totally BS'ing, but wouldn't that be funny?  The idea isn't much sillier than Most Haunted selling an app to turn your cell phone into an EMF meter. I have to wonder how many people would fall for it. "Look!!  It's working! I'm getting 8mGauss!!"