Knees as 'takedown defence'

[alex]

not to mention that even if it hits, it basically has to KO them otherwise you just gave away a freek takedown by giving them your leg. not really something i would recommend trying

[PointyShinyBurn]

Watch Joachim Hansen vs. Imanari and Caol Uno if you want to see it work. Sherk vs. Hermes Franca is a good example of it repeatedly not quite working.