Disagreed. I’ve been tasered. If it gets you right, you’re down for five seconds (or longer if the trigger remains held), but you aren’t unconscious and once the arc stops you can immediately move and fight. You can see the frame where he gets the halligan in the dome and his head rotates. Pretty sure he was lights out while still on his feet.
As an aside, that cop was utter junk. The firefighter should never have been left hung out to dry to be in that position.