As a previous poster said, a mag check is valuable in all turnarounds.
I was even shown by some instructors how to do a power check whilst taxying against the brakes. It was a mighty long taxi to the hold.
Back in the real world we must remember that spark plug fouling most often occurs at low revs/full rich, being detectable as a mag drop difference and rough running.
Very occasionally this can be burned off. It's interesting to see what is causing the plug to short when you take one out. The cake across the gap sometimes even has a blob of molten lead sat there.
PPMMTTFFGGHHCCC
Yes, a mag check for L/R/off -on. Check for full power when you fully open the throttle. That's two bases covered. Is your compass reading the same as the runway heading that you want to use?........I really must remember to look more often!