Perspective Uno:
Yossi, what the heck are you thinking?! It's a plain, simple Shabbos, no one is interested in that long Belz Av Harachamim song for Mimkomcha! Save it for when you need to impress someone.
Two minutes later:
Kalman, what's the matter with you?! You're butchering a beautiful song by being off-beat at the rhythmic escalation. For the love of everything holy, listen to yourself! Can't you hear that you're the only one starting the next bar at downbeat 1? You're supposed to wait till the upbeat! And stay at 65 BPM, what are you doing at 80? And because you have the loudest voice in the Shul, you're throwing everything off-kilter. Grrrrr