double maxVelocity = 0.05D;
            if(entity instanceof EntityPlayer)
            {
                if(((EntityPlayer) entity).isSprinting())
                {
                    maxVelocity = 0.1D;
                }
            }
        double maxVelocitySq = maxVelocity * maxVelocity;
        double currVelocity = entity.motionX * entity.motionX + entity.motionY * entity.motionY + entity.motionZ * entity.motionZ;

        if(currVelocity > maxVelocitySq)
        {
            if(entity.motionX < 0.0D)
            {
                entity.motionX = MathHelper.clamp_double(entity.motionX, -maxVelocity, 0.0D);
            }
            else
            {
                entity.motionX = MathHelper.clamp_double(entity.motionX, 0.0D, maxVelocity);
            }

            if(entity.motionY < 0.0D)
            {
                entity.motionY = MathHelper.clamp_double(entity.motionY, -maxVelocity, 0.0D);
            }
            else
            {
                entity.motionY = MathHelper.clamp_double(entity.motionY, 0.0D, maxVelocity);
            }

            if(entity.motionZ < 0.0D)
            {
                entity.motionZ = MathHelper.clamp_double(entity.motionZ, -maxVelocity, 0.0D);
            }
            else
            {
                entity.motionZ = MathHelper.clamp_double(entity.motionZ, 0.0D, maxVelocity);
            }
        }