"We were halfway out on the wire and a couple of people on the front got kicked around and started to lose their balance. I thought someone may have fainted. We just don't know," he said.
Wallenda says 'Never Give Up' after 5 tightrope walkers hurt →
Wallenda said four people remain in the hospital, with one expected to be released later Thursday.
The Latest: Wallenda: Performer may have fainted before fall →