Ibra struck four goals for Sweden in victory over England on Wednesday.
Wenger told arsenal.com: "I believe we are all amazed because, sometimes, when a guy has a shot from 30 yards and puts it in the top corner, you say 'it's a fantastic goal' - but somehow you believe you can do that as well, even if you cannot do it on a consistent level.
"But when he scores a goal like that, you think it's impossible for a normal athlete. You have to be an exceptional athlete to do that.
"They say he's a master in kung fu. You could see that on Wednesday night. You need some special flexibility, subtleness and physical strength to do that, apart from the fact that you have to realise what you have to do.
"When [England goalkeeper Joe] Hart headed the ball, he took a distance to eventually get the ball. There's intelligence included as well. I'm an admirer of collective goals, but as an individual achievement, just you and the ball in the situation of the game, it is something exceptional."