The act started with Hero, wearing a rescue vest, giving a prone Sara CPR, then switched to various beach activities like volleyball, Frisbee, and Hero skateboarding.
Last week Carson used a Tomb Raider theme.
But the pressure is on with only five acts from Tuesday's show going forward into the finals.
The live performance drew praise once again from the judges with Simon Cowell gushing "I loved them. You're a star...amazing."
Carson had to come up with a completely new act after making the semi-finals last week and that impressed judge Howie Mandel.
"You've got to take this into consideration America, she didn't know she was coming to the semi-finals. She got voted in last week. She put this together in five days. That's amazing!
Sara and her dogs will count on the American public agreeing with Mandel to give her enough votes to push her into the finals.
That result comes tonight on NBC at 8 p.m.
On her Facebook page she wrote,"Thank you so much to Everyone!!! Who took the time and voted! Can’t thank you enough! Looking forward to the results tonight!"
See Sara's Tuesday night act below.