If anyone does not want the vibration to occur when opening the camera with the wrist twist method, I found that it can be turned off by using the Xposed mod: (you need root) install AppOpsXposed then going to App Ops in setting, go to device, and turn off vibration rights on the camera app. No more vibration! I was also looking for a way to turn off vibration when unlocking in active display (though the 4.4 update made it a lot less intense) but I haven't found a way without just turning all vibration off. I have a love hate thing with haptic feedback. Anyway, hope this helps someone.