Want all your enemy Shaco's to take damage? Here's how you do it.
Walk into the blue/red pit 10 seconds before it spawns.
Congradulations! Shaco now has an ability which won't help him with his clear, he'll have to start without a leash (because it's too late to call for help), you've minimized the potential of a level 2 invade on your jungle, and you've drawn attention away from your ADC in teamfights (because you were the piece of crap that ruined his early game, he wants you to die first)! You're like the MVP of the game, and it's only the first 2 minutes of the game!
The last player that did this to me was a Nautilus, who stayed in the pit just long enough to trigger the boxes, then he flashed over the back wall and got out scott free. What could I do? Nothing! My mid was already in mid lane, my bot was already in bot lane, no one could help me and no spells or abilities that I had would help me get revenge for him spoiling my first clear. But that's the counterplay to Shaco's damage free start.