Come on lah guys, assert urself…... just say politely that he
should refrain from shaking his legs. Otherwise, just make him
paiseh loh. Say at the very top of ur voice how uncomfortable and
fustrated u are due to the person’s inconsiderate behaviour. If he
still persists, just in the middle of the lecture, get out from ur
seat and move all the way down to the vacant seats in front.
Everyone will know by this time why u wanted to change seats and
that person will be labelled “inconsiderate”. So come on, do start
asserting urself!