Necessary force

Made it in time to Kung fu despite hectic meeting schedule at work. I was happy to see the lad I injured last week was there - looks like I didn't cause any lasting harm. Went through nam chuan again with T but it's still not really sinking in so it's a good job it's not something I've got to grade on. Then lots of wing chun again, and some bokken.
Downstairs to tai chi without a break and straight into yang short form to the left which is always a challenge, but I actually felt quite pleased with my focus. 

Then we did some 2-person work where D asked us to try to think of how we could "add more power" to a move. When it came to my turn to demonstrate my suggestion it was accused of being particularly brutal! I don't think I've really got the hang of the tai chi minimum force attitude - I'm more of the "if someone is trying to hurt me then they've lost their right not to be hurt" school. Finished with a bit of chen, which made my knees hurt as always, and I still can't do the exploding outwards bit properly.