Turnbull red card
https://youtu.be/TPa6OMBUBVk

Turnbull attempts to win a ball that's over head hight while the keeper runs out to collect the ball.

SERIOUS FOUL PLAY
Any player who lunges at an opponent in challenging for the ball from the front, from the side or from behind using one or both legs, with excessive force or endangers the safety of an opponent is guilty of serious foul play.

Another pretty straight forward decision

The GG high boot

Sibbald did slightly touch the ball with his studs and then hit GG in the mid section. Good arguments for a yellow. OH was yellow carded for a much higher boot and potentially dangerous challenge v Killie where he was yellow carded.

So no real complaints about obvious misses

I believe both Goldsons hand balls v Celtic should have been penalised. However, there is a rule that prevents any action if the defender is protecting his face providing it doesn't make his body bigger. You might not like it but there's at least some justification.

God this is easy 😂

Goldson handball vs Sheep

The ball rolls down the top of his arm hitting his shoulder first. Not in an unnatural position or dictating the movement of the ball.

Abada shirt pulled in box - no pen (St. Mirren)

St Mirren defender extends his arm and actually misses Abada. Tugs on shirts are so easy to spot these days. Abada then falls forward, something that doesn't happen if you are pulled back.