Four minutes is pretty solid for that much water in your face.

Wait, you actually got the smoke alarm to go off at 400 degrees? I thought those things only triggered at 450 plus.

Wait, have you checked how their ears line up with their jaw when they talk? I noticed a lot of these fakes have the ear lobe sitting too high or too low compared to the mouth movement, like the whole head is a flat image being bent and stretched. It's subtle but once you see it you can't unsee it, especially in side profiles or 3/4 angles. That plus the blink thing you found, I bet you could spot fakes in under 3 seconds. It's like the software just doesn't bother with ear placement because most people never look there.