Before and after videos show Clinton's stumble at 9/11 memorial

Two separate videos show Hillary Clinton stumbling after unexpectedly leaving a 9/11 event in New York City on Sunday and then emerging from her daughter Chelsea's apartment in good spirits.

Clinton spokesman Nick Merrill said the Democratic presidential nominee was attending the September 11th Commemoration Ceremony when she felt overheated and "departed to go to her daughter's apartment."

Clinton left the ceremony around 9:30 a.m. ET. The statement from her campaign came at 11:00 a.m. Clinton left Chelsea's apartment at approximately 11:45 a.m.

The first video shows a wobbly-looking Clinton being helped into a van upon leaving the memorial service:

The second shows her emerging from Chelsea's apartment:

Asked if she was feeling better, Clinton said: "Yes ... thank you very much." She also told reporters: "I'm feeling great. It's a beautiful day in New York."