Oh, I like that! What is a block jump?
Squat - touch ankles - jump with hands up.
You don't have to touch your ankles, it just keeps you honest. "the term "block jump" is from volleyball. When you block a spike at the net, there's np approach, you can't swing your arms or you'll hit the net, so it's all quads.
Ah thanks, that makes sense. I wasn't finding it as an exercise but I did find the volleyball term and didn't look into it further. I may have to do this! :)