/cancelaura NetherwalkDrops Netherwalk early. The immunity also stops you dealing damage, so once the dangerous moment has passed you want it gone rather than sitting there doing nothing.
World of Warcraft · Demon Hunter
Interrupts your focus if it is alive and hostile, otherwise your current target. Disrupt has a short enough cooldown that you want it pointed at the right caster every time rather than most of the time.
#showtooltip Disrupt
/cast [@focus,harm,nodead][] Disrupt