Modified version of the move called the "Hendo"
To knock someone down with the right hand and (instead of dropping an elbow into them) you jump into the air extend your leg and drop it strait into their stomach.
Do a flip or start from the side to make a harder impact.
Suffering trauma to your groin and ejaculating has nothing to do with the word "Hendo"
The 'Assassin Walk' is the mythical representation that the Assassin's from "Assassin's Creed' are the creators of the first Gangsta Walk. This mythical representation is taken from the 'Assassin's Creed' games. Notably: 'Assassin's Creed (The First Game)', 'Assassin's Creed II', 'Assassin's Creed: Brotherhood', 'Assassin's Creed: Revelations', and essentially most or all PSP affiliated 'Assassin's Creed' games.
The actual walk is to walk with your hands, wrists and arms back and walk with only your shoulders moving.
The real Assassin's that existed way back then may have actually walked like that to be aware of possible surrounding attackers.
Friend: Dude, you walking like a Gangsta! You can't do that, you ain't a Gangsta like me.
Assassin Walker: You're right... I'm not a gangsta. That's why I'm using the 'Assassin Walk'. I'm walking like from the creators of your precious Gangsta walk.