Checking the white count of a waterfall

I was on a road trip with Christian and someone else. We pulled off the road to look at a waterfall. The waterfall was contained by a large cement ledge; the water level was pushing up over the ledge and it looked like only surface tension was preventing the entire water basin from spilling over.

There was something eerie about the whole setup, either the water level was somehow controlled by hidden electronics not to flood, or that we got there at the wrong time, right when the balance would tip.

I was angry that I forgot my camera, and then heard this message over speakers that when I tested the water for polymorphonuclear leukocytes, the count would be high. The speaker sounded jaded when he said, "Of course, the count will be high, as it always is in rushing waters."