Taking a mirror photo or selfie in a public area (ex: bathroom) that appears to be empty; but at any given moment someone can walk in catching you during the act of a selfie.
Jen: “Wow! Cute outfit!”
Marissa: “Thanks! It was definitely a High-Risk Selfie since someone walked in right after I took it.”
Supposedly premium gas that is actually just crappy-a** petrol that causes your engine to run really rough and lack power.
I wonder if the real reason that the dude who was driving the Hot Rod Lincoln experienced a lot of piston-pinging after his race with the Cadillac was that he was using high-knocktane fuel, rather than his simply having run his engine too hard.