When you are jungle Teemo and you see the enemy going for Baron
so you wait for them to get it low so you can smite it http://i587.photobucket.com/albums/ss313/Jimmibabby/GIFs/tumblr_lscbfaQtG91qik7kl.gif
so you wait for them to get it low so you can smite it http://i587.photobucket.com/albums/ss313/Jimmibabby/GIFs/tumblr_lscbfaQtG91qik7kl.gif
But then you die because the enemy is too slow to do baron, giving it enough time to kill you slowly.
I always use Sweeper before going for Baron. Teemos lurk in every game... even if no player picked him...