I am enjoying hearing the pain that others have endured that mimic'd my own with this :)
Here's one to try, guys.
Play a Pen Flinger, then play a spell.
Before the Pen Flinger goes back to your hand, it turns green for a moment like a minion does if it is available to attack. Select it and move it to the enemy hero as if it were attacking them. It will hang, and your enemy's portrait (at least from your point of view, not sure about theirs) will be a Pen Flinger for the rest of the game. It's hilarious.