There was no intention from Baines. Mane's knee seemed to get caught under his own body weight.
Mane dangling his leg in there was childishly over-eager, it's the kind of thing you get told early on is a no-no. Watched it in horror.
Think klopp said he expected far worse as well watching it.
Always go in balanced, with the rest of your body braced close, aligned to absorb impact, never over-extend.
You don't expect the club to ground them all in basic martial arts principles but some instructions on posture, shape and protecting themselves going in should be compulsory really.