Just like Adrenaline but rather from the internet instead. Specifically video games of the MMORPG or FPS genre. See "Boom Headshot" on YouTube.
"What can I say? There's nothing but the rush of hunting people down and killing them! I mean my hearts beating! MY HEARTS BEATING! My hands are shaking! MY HANDS ARE SHAKING! BUT I'M STILL SHOOTING! I'M STILL GETTING HEADSHOTS! It's like BOOM HEADSHOT." -Some Guy Consumed in E-Drenaline