Talk:Undertow/@comment-17703786-20140422112906/@comment-187.2.193.193-20140805234134

Currently 3 things in Warframe deal an illusive damage type called "Finishing Damage", not to be mistaken for "Finisher Damage" (Thanks, DE. Makes all this easier)

Looky here:

http://warframe.wikia.com/wiki/Damage_2.0/Finisher_Damage

The other 2 things are Ash's Bladestorm and Hydroid's Tentacle attack. If it's the Robotic's armor type that gets a bonus damage and not the hitbox, you could crosscheck this behaviour by going with Ash and bladestorming some corpus. If it's a bonus damage against the armor type, have the Wiki-Page updated. Currently, no bonus against robotic is indicated. (Can't check myself, not at my game PC)