OK, had test #2 at the neurophysiology lab. This one was called a cutaneous electrogastrography and using the water load/water challenge test. I was sitting/lying in a huge recliner (Lazy-Boy style) with 3 electrodes on my stomach. They took readings for 10 min, then I had to drink as much water as I could until I felt full, and then they took more readings for another 30 min. Basically I caught up on sleep! Yes, I fell asleep!
So after downing nearly 500cc of water and waiting 30 min I seriously had to pee. Thank god the washroom was NOT occupied!