I've passed 4 so far. I'm never scared when I take them it just sucks because one time I drank a gallon of water on the wrong day and had to stop on the side of the road to take a piss before I got there and once on the way back. Then one other time I couldn't find the place so I pissed in the gallon jug inside of my car at a stoplight and a van next to me saw.