A hard workout focusing on basics (uchi-uke, age-uke, soto-uke, maegeri, back and forth, back and forth, back and forth....), which is the kind of session I really enjoy. People who don't do karate - and people who do it but don't go to serious clubs - don't appreciate how fit it makes you and the rigour it puts your body through.
A real rarity: after about 40 minutes of this Sensei gave us an extended rest while people of each belt colour did their respective kata. He even said that because we worked hard we deserved a break. I have never heard him say that before.