I'm wondering if the gentleman isn't closing his eye lids right before the arc occurs to protect his eyes.
If not, I can't believe he can still see
I've seen others close their eyes to tack a single spot(spot weld)
Is this technique successfully used by others?
I thought that too. But later in the video you can see him from the side its doesnt appear that he is closing his eyes. Maybe he is idk either way seems crazy to me.