SGS4 - Turn Off Vibration Notification While On Call

[jjcampnr]

I can't find the option to shut off the vibration notification for emails/SMS while on a call (phone to head, not headset/BT). I've tried disabling the "Alerts on Call" option under Call/Call Settings/Call Alerts but that doesn't seem to do it. Where am I not looking? When I'm on a call and an email comes in the phone vibrates against my head so hard it feels like my eyes are going to pop out.