Describe the bug

At least when using iron & silver greatswords, instead of the 20% critical hit chance, you can get consistent criticals by using vanilla minecraft methods (jumping up, and attacking when you start falling). Haven’t tested using greatswords of other materials, but I would expect results to be similar.
To Reproduce
Steps to reproduce the behavior:

1. Jump
2. Fall
3. Swing at opponent with greatsword whilst falling
4. You should get a critical hit
   Expected behavior

Every 1/5 hits should be criticals, and you should not be able to get consistent critical hits using vanilla minecraft methods.

Screenshots

Info (please complete the following information):

• Modpack Version:
  • 2.77.5
  • [ | ] 3.0 BETA 4
  • Other:
• Server or Singleplayer:
  • Server
  • [ | ] Singleplayer
• Version the world was created on:
  • 2.77.5
  • [ | ] 3.0 BETA 4
  • Other:

Additional context

It goes for almost half the weapons in the mod too.

This issue is no longer relevant due to the new combat mod taking precedence over vanilla combat.

Caused by the same thing as #62, relevant issue being SanAndreaP/BetterCombatRebirth#21