... how exactly do you tell a sf doing something extraordinary if it's something mundane (which sounds rather contradictory) like extra dmg from doing a normal action?
things like climbing walls are simple.. it's either special.. or bugged.
Sometimes you just notice odd patterns. Some of the SF in Astrum for example appear to have the afore-mentioned cavalry charge ability. They hit like a ton of bricks in the first round of melee, but their damage output drops sharply thereafter, something like a 40-60% drop if I remember - and such a steep drop cannot be explained by casualties. You tend to notice that kind of thing when it happens to your unit.