Hehehe... If someone ELSE has an auto-injector set up in their PAN when you hack it, there would be a hell of a use for one. Especially if they have the six-barreled kind. Hit them with everything. Six shots of Nitro, all at once... That would be a hell of a thing to watch. Or, just the sad sack that has an emergency dose of K-10 set up for when his biomonitor shows him starting to tank out in a battle? Watch his face go "Oh shi..." at a formal party right before he goes on a suicide rampage.
Edit: Also, I hope that shows the supreme importance of beefing up your PAN security if you get one of these precious toys installed in your body. Just pay your hacker to slap a Rating 6 Firewall on your stuff. Maybe some IC, too...