Getting my balance back

I little overhead squat action to test my snowboarding knee injury this morning. (Later confirmed that there was some mild trauma to the knee--potentially a meniscal tear and/or cartilage damage. I'm going to have it looked at again, but the quick verdict was didn't look high-grade, so probably a few weeks of being nice to it will be enough....)

Warmup:

Barbell complex
3x (10x Abductor, 10x adductor, 10x glut extensions)
5x OHS: 45#, 65#

5x5 OHS: 85#, 95#, 95#, 105#, 110#

Cooldown:
5-4-3-1 strict pull-ups interleaved with 10-6-5 hanging knees to elbows

Everything felt pretty good for not having done OHS, let alone any lifting, in quite a while. The knee felt good except when I thrusted the bar up on the last work set. Balance, however, felt much weaker than the last time I squatted. I really had to work at the higher weights and felt like my shoulders were doing a lot of work. I realized that really pushing to engage the core helped keep my balance and get all the way down.