“We were shooting a scene, we’d been shooting all day, and luckily I didn’t go back to my trailer,” Okenkirk said. After shooting the scene for the AMC series, the actor stayed on-set to ride a workout bike “and I just went down.” He adds, “Rhea said I started turning bluish-gray right away.” It took three hits from an automated defibrillator to get his heart beating again.
Source: Bob Odenkirk Thanks Fans One Year After Heart Attack – Deadline