[Serious] Is the Past Real?

[LinuxGal]

The relationship between past and present is like anything else, you assign it value based on your belief. If a tree u r touching now in the present is currently useful and actualized. When u go back inside the tree is still real because of the actualized value. Seems the present heavily weighs usefulness and the further back or forward from now we discuss the less actualized it is, but it’s usefulness might not diminish at the same rate.

If you should ever find yourself standing a few kilometers from ground zero of a thermonuclear hydrogen bomb, please note that you will be experiencing a past event that only lasted a millionth of a second.

You don't experience past events, you experience present events.  In the case of the bomb, you experience a flash of radiation and a blast of air.  These present events have a cause in the past, however.