Les Règles

Every time this player performs a Block action (on its own or as part of a Blitz action), they must follow-up if the target is pushed back and if they are able.
If the target is still Standing after being pushed back, and if this player was able to follow-up, this player must then perform a second Block action against the same target, again following-up if the target is pushed back.
If this player is performing a Blitz action, performing a second Block action will also cost them one square of their Movement Allowance.
If this player has no Movement Allowance left to perform a second Block action, they must Rush to do so. If they cannot Rush, they cannot perform a second Block action.
Note that if an opposition player in possession of the ball is pushed back into your End Zone and is still Standing, a touchdown will be scored, ending the drive. In this case, the second Block action is not performed.
A player with this Skill cannot also have the Grab skill.

Q: If a player with the Frenzy skill performs a Block action against a Rooted player and rolls a Push Back, does the player with Frenzy still get to perform a second Block even though the Rooted player cannot be pushed back? (p.77 & 87)
A: Yes.

Q: If a player has both the Frenzy skill and the Stab trait, if they declare a Block action which results in a Pushed Back result when they follow up and have to perform a second Block action, can they then use the Stab trait to replace the second Block action with the Stab Special action? (p.77 & 86)
A: Yes.

Q: When a player with the Frenzy skill makes a Block action against a player with Foul Appearance, if the first Block action results in the player following up and performing a second Block action, do they need to make another roll for Foul Appearance? (p.77 & 78)
A: Yes.

Q: Can Hit and Run be used after a Block performed by a player with the Frenzy skill resulting in a Push Back, in order to move away from the targeted player and not perform the second Block? (p.5)
A: No. Frenzy requires the player to have to follow up and perform the second Block. Hit and Run may be used after this second Block as normal, if applicable.