At the top of the nation's second-tallest building, the
That was the message from Willis Tower officials after some visitors said they heard cracking Wednesday night.
"I had my palms on the floor, and I could feel it cracking," visitor Alejandro Garibay, 23, of Stockton, Calif., told the Chicago Tribune, explaining that he was leaning down for a picture pose. "Honestly, I was in shock, in disbelief. I was scared."
"One of the craziest feelings I had in my life," added his cousin Antonio Saldana. "I thought I was going to fall through."
The pane of glass on the 103rd-floor area known as the Ledge is coated to prevent scratches, officials told the Tribune. When someone scratches the glass, it's normal for the coating to crack.