Knockdown 
Feat 4FighterFlourishSource Core Rulebook pg. 146 2.0Archetype MaulerPrerequisites trained in
Athletics
You make an attack to knock a foe off balance, then follow up immediately with a sweep to topple them. Make a melee Strike. If it hits and deals damage, you can attempt an Athletics check to Trip the creature you hit. If you’re wielding a two-handed melee weapon, you can ignore Trip’s requirement that you have a hand free. Both attacks count toward your multiple attack penalty, but the penalty doesn’t increase until after you’ve made both of them.
Archetype Use
This feat can be used for one or more Archetypes in addition to the listed Classes. When selected this way, the feat is not considered to have its class traits.
Knockdown Leads To...
Improved KnockdownTraits
Flourish: Flourish actions are actions that require too much exertion to perform a large number in a row. You can use only 1 action with the flourish trait per turn.