"Event Horizon"
*While Chunk is out on a date with Connie, he stops two muggers but is then shot by an unseen assailant. The shot opens up a vortex within his body, which sucks in everything around him, including people and even light. The Central City Police Department calls their Keystone counterparts to get Flash involved, but even he is soon sucked into the vortex. Meanwhile in Keystone, Captain Cold is on a crime spree, but is warned to stay out of the city by Mirror Master. Inside the vortex, Flash has to grab hold of the bullet that started it all - a very painful process, but one which returns everything to Central City.
Jerry and Tina McGee discover later that the bullet was laced with white dwarf matter in order to cause the reaction with Chunk's body, but they don't know why. Outside the hospital room, Chunk is observed by Plunder, who tells Mirror Master to make sure their boss pays up for his part in putting one of Flash's allies out of action. *Source: dcuguide.com