Why could my dad tell me and brother that he was died

I feel like my dad hide is illness to us last 5 year he been really sick but last 6 month he he could walk anymore he will fall down lot I would him help the last time he fall took me 6 hours get him off the ground week before he died he told me these time he walk up these stair first last time I did not know what he mean at the time now I do mean tell me goodbye for last time what change me was see my dad take his last breathe he did know I was there because his eyes closes 10 Minutes before he died my mom call me at 5:30 am tell me that collapse on the bedroom floor she said that she called ambulance few minutes that  got there already on he was the stretch being wheel to amulance see my own dad lifeless body being wheel to ambulance that did cpr 50 times there no life left in my dad he died that morning went two ambulance got struck knew his signal that going to heaven seen that day never been same see your dad died in the hospital bed he was so plain blood vessel pop on his face he was not the same dad I know at his funeral he was so cold by the touch of his hand so swollen whole body swollen hard thing set up funeral tell goodbye it be 9 month next week crazy known never see dad again but know he is in better places right now