He could have been taking a line but if he was getting a hair cut then his hair cut wouldn't have been finished and that would have been obvious. Maybe he was doing both. Took a bump right before he had started a hair cut. I don't think BP rised fast enough to give him a stroke. I think he just so happen to have had a heart attack then.
He showed all the signs my dad did apparently. Dizzy spells, maybe lightly passing out like he had done before, light headedness before having the heart attack. Rich also had an enlarged heart.
Not saying this is what happened but it's a good guess after watching it happen to both my parents.