im sorry for ur loss ill be praying for u and ur family. i dont know medical wise wat to say bout why he died. something like tht happened to my grandma in 2007 i was goin away for the weekend with my friend and my grandma had been fine she lived with us and she came downstairs like normal n seemed fine and everything. but when i got to the place i was goin i got a call 2 hours after i left from my dad tellin me she died just like tht. it was such a shock to me n to this day im still sad about it but i know shes happier where she is now. but it hard to deal with a family member dying especially if they seem fine the last second u see them b4 they go. ill pray for u. itll be hard but keep looking up

Thankyou so very much. May God continue to use you more than you could ever imagine

im glad tht could be of some uplifting