On Wednesday I took my car to the Toyota dealership to have them do work that they said would take 30 minutes. Well, the work ended up taking 2 hours (WTF?) and about 90 minutes in, I was just angry! I was dressed casually enough that I could channel my frustrations into a workout.
I found a 12" curb and used it to do this:
10 squats (using curb as a reference point)
10 knee-ins (balanced on the curb)
10 pulsing lunges
I repeated this sequence 5 times. And I have no idea why I was surprised when my glutes were getting sore by that evening -- pulsing lunges ALWAYS break my a$$!