The gif's a bad angle, but watching the fight live it looked like he just closed his eyes and swung when he saw Erick start to swing. You can even see he doesn't notice Silva is knocked out and falling down and he has to look up before he notices
And no, Condit is no slouch in the striking department but he was soooo far away from DHK when he launched his strike. It was literally coming from miles away and he still got hit with it
no, no it was not literally coming from miles away. Also, I said "dong" when it landed.