Situation: In a group where a player has been downed, then another player gives half his health to revive him. Until he is revived there's no way of knowing he has been given health, this leads me to run over and expect to give health - whilst receiving a second or two of invulnerability. Yet the player already has health and i have the potential to get hit.
I know there is an animation of two hearts for a second or two when this process happens. But nothing remains, and ive been caught out by this too many times.
Suggestion: Leave an animation near the knight - or on the left hand side near his name which notifies that he has been donated health by another knight.
Smply the small bubble with a winged hearth that appears on top of you when someone already revived you should be visible to everyone.
http://wiki.spiralknights.com/File:Icon-raise.png