This nunchuck technique is in the advanced nunchaku level, because the timing to do it must be perfect, if not, when you try to catch the nunchaku under the leg, and the timing is wrong, you will hit your leg with the chuck instead of catching it.
It is called from near leg, because this nunchaku tricks starts with the chuck going under the leg that is in the same side of the hand that is holding the nunchaku.
Tutorial:
Slow motion: