Are there rules for PCs making checks to identify class abilities of NPCs? For example, if a Monk uses Slow Fall, or a Druid uses Woodland Stride, or a Paladin uses Lay On Hands, can nearby PCs determine what the ability was, and possibly what class or class levels the NPC has?
There are rules for identifying spells and identifying monsters, but are there any (core or 3rd party) for class abilities? Obviously many players would be able to meta-game the information, but it stands to reason that a character may not have intimate knowledge all other class abilities, especially those of a high level.