Don't let objectives come down to a 50% - Morello lag chance.
Fellow summoners, there is something that lies heavily on my heart.
Say your bot and jungler are trying to rush dragon after they 3-manned the enemy bot. Dragon is starting to fall low, but is still out of smite range. Your green ward reveals the enemy Lee Sin that is literally just standing there waiting to zoom in and steal it.
Now what do you do? STOP ATTACKING DRAGON. Either kill Lee outright if he's careless or chase him away for long enough to finish dragon safely. Of course it also depends whose reinforcements are closer, if the rest of your team is coming too while the enemies are still a mile away, just wait until you are in full force and scare the enemy jungler away.
If the enemy is closer and you're running out of time, it was a bad call in the first place. In any case, dragon is not worth giving the enemy 4 kills, so either one of you scares Lee away and the rest rush dragon down and you flash over the wall to escape, or you forfeit it.
In any case there is never, never ever, not in this dimension or another, a reason to let an objective come down to pure chance. Especially not if they have a better execute or Nunu/Cho.
Yours truly,
A silver II scrub