My condolences.
I remember my grandfather. We had some good times. I remember this one time when he had us over for dinner and my dad (his son) destroyed him with a savage joke and he quietly took his napkin off his lap and placed it on the table, stood up, and then grabbed a broom from the corner and beat the living stuff out of my dad. My mom and I laughed our asses off, but after the third straight minute we started to get concerned. When we got home, my dad took the wind-shield scraper out of the trunk and mercilessly beat me down in the middle of our driveway. Good times, though. Hopefully you had good memories with him.