If you saw one of your relatives that has passed on would you be happy or freaked out?

I tend to see people in my family that have passed on already so the morning my grandpa died I didn`t know yet but when I woke up I thought I saw him but I knew that he was in the hospital and I checked my phone and I had a voicemail that said he had died earlier that morning and so I was just scared but grateful that I saw him. Is this normal or do I just think I see them? Just last night I swear to you my great grandpa was sitting in my rocking chair singing and just looking at me.