Don't worry man, i've "bricked" my phone twice doing this... Purposely. Why? Because I'm an OCD freak (well, not really) and I had a few scratches on the screen and I wanted it replaced when I got my phone protective film in. What'd I do? While flashing odin I unplugged it during the factory.rfs. After unplugging it, the phone no longer booted to ANY screen, not even responded to power from USB.
Took it to ATT said I think it was a USB problem, tried to power it up with another battery as well as another USB outlet, which of course, was a no go. Brand new phone out of brand new packaging.
Oh and btw, actually the first phone I returned I replaced the water damage sticker right by the battery prongs. My phone wasn't damaged, but I managed to get a few water droplets on the phone while I was biking, opened the back, lifted up the battery, and of course I tilted the phone so the droplets when towards it. What I did? Took out the sticker, and replaced it with white tape. Again, i did the odin pull plug technique, took it to att and the guy didn't even look at the sticker, focused mainly on trying to get it on.