double mHorizontal = 1.4D;
	double mVertical = 1.2D;

	@EventHandler
	public void onVelocity(PlayerVelocityEvent event){
		Player player = event.getPlayer();
		if (player.getLastDamageCause() == null){return;}

		if (!(player.getLastDamageCause() instanceof EntityDamageByEntityEvent)){return;}

		if (((EntityDamageByEntityEvent) player.getLastDamageCause()).getDamager() instanceof Player) {event.setCancelled(true);}
	}

	@EventHandler(priority = EventPriority.HIGHEST)
	public void onEntityDamageEvent(EntityDamageByEntityEvent event){
		if (!(event.getEntity() instanceof Player) || !(event.getDamager() instanceof Player)) {return;}

		if (event.isCancelled()) {return;}

		Player damaged = (Player) event.getEntity();
		Player damager = (Player) event.getDamager();

		if (damaged.getNoDamageTicks() > damaged.getMaximumNoDamageTicks() / 2D) {return;}

		double mSprint = damaged.isSprinting() ? 0.8D : 0.5D;
		double mAirtime = damaged.isOnGround() ? 1 : 0.5D;
		@SuppressWarnings("deprecation")
		double mKnockbackEnchant = damager.getItemInHand() == null ? 0 : damager.getItemInHand().getEnchantmentLevel(Enchantment.KNOCKBACK) * 0.2D;

		Vector knockback = damaged.getLocation().toVector().subtract(damager.getLocation().toVector()).normalize();
		knockback.setX((knockback.getX() * mSprint + mKnockbackEnchant) * mHorizontal);
		knockback.setY(0.35D * mAirtime * mVertical);
		knockback.setZ((knockback.getZ() * mSprint + mKnockbackEnchant) * mHorizontal);

		try {
			PacketPlayOutEntityVelocity packet = PacketPlayOutEntityVelocity.class.getConstructor(int.class, double.class, double.class, double.class).newInstance(damaged.getEntityId(), knockback.getX(), knockback.getY(), knockback.getZ());
			((CraftPlayer) damaged).getHandle().playerConnection.sendPacket(packet);
		} catch(Exception e){
			e.printStackTrace();
		}
	}