After his terrible hospital stay last week, Travis Barker made a surprise appearance for a show. He seemed quite fit while he was on the stage. On July Fourth, Penelope and Reign were riding in the back of a vintage orange pickup truck driven by Travis and his wife Kourtney Kardashian.

As they sang along to Bruno Mars’ “Grenade,” they seemed to have had a blast.

Following his admission to the hospital, Travis has claimed to be feeling much better.

As per sources, Travis’ colonoscopy triggered pancreatitis, a dangerous condition that required days in a hospital bed while physicians performed tests and provided treatments.

Last weekend, Travis posted the following post on social media: “I went in for an endoscopy Monday feeling great. But After dinner, I developed excruciating pain and have been hospitalized ever since.”

He further added:  “During the endoscopy, I had a very small polyp removed right in a very sensitive area, usually handled by specialists, which unfortunately damaged a critical pancreatic drainage tube. This resulted in severe life threatening pancreatitis.”