When Igor leaped out of Arnold's Timeline, Arnold was already utterly exhausted.
Allowing someone to leap unresisted within one's Timeline is indeed a taxing endeavor. Arnold had cooperated completely with Igor, and the magnitude of Igor's leap was already rare. The number of Timeline Leaps he made in such a short time had set a record within Arnold's world.
"Is everything alright?" Arnold asked the moment Igor leaped out, his tone a mix of concern and gritted-teeth determination.
Igor responded with unwavering certainty, "I've found it. Don't worry."
The words "don't worry" weren't just for Arnold, but for everyone present. He intended to instill confidence in everyone, as they would need to work together wholeheartedly.
