CHICAGO — Daredevil Nik Wallenda wowed Chicago and the world Sunday with two hair-raising skyscraper crossings on high wires without a safety net or a harness, and performing one blindfolded.

“I feel incredible,” Wallenda said at a news conference in a nearby hotel after completing the tightrope walks.

Recalling what made him nervous during his aerial performances, he said strong winds and the unexpected 19-degree angle of the first high wire — he had practiced at a 15-degree angle — caused him to hurry his performance.

Thousands of cheering fans packed the streets around the city's Marina City towers to watch the 35-year-old heir to the Flying Wallendas' family business complete the back-to-back walks.