Rapper Snoop Dogg and a hologram of deceased rapper Tupac Shakur perform on stage at the Empire Polo Field on April 15, 2012, California.

  A ripped Tupac miraculously appeared on stage without a shirt on.

• Thousands of affluent, predominantly white kids checked their heartbeats, made sure they weren't hallucinating, and then took out their phones to .. vigorously snap photos of Tupac's computer-generated six-pack.
• The amazingly detailed hologram started rapping. 
• hether you found the whole hologram thing disrespectful or thought it was the most amazing thing you'd ever seen, it's tough to deny how impressive the projected image looked. As one fan explained in his wonderfully articulated YouTube reaction video: "Technology is a motherf---er these days."