Someone may have said this before...
I'm an Empathy defender with Recovery Aura.
If I am too low on endurance to actually use Recovery Aura and try to activate the power, it triggers the animation as if I had used Recovery Aura (spread of the arms, blue circles of light, y'know...) but doesn't buff me or my teammates.
This usually being done as the immediate predecessor to a big fight or during a battle, most teammates will fully believe that they're covered by the aura while the icon remains outlined in red in my powertray.
If left to fire when the proper endurance is accumulated, the aura properly buffs, but does not produce the animation.
Just a small problem, but causes grief when people think they're buffed, but they're not.
See what you can do, please?
