Shrubbery

People who do not back into parking spots cannot be truly present. You have not prepared for the future, so you cannot remain in the present without anxiety.

If memory serves me right the protagonist in Inception was confused a lot

Dicarpio’s character wasn’t confused, you may be thinking of Elliot Page’s character, but I wouldn’t count that character as the main protagonist.

I feel bad for people who need to invoke religion to explain this

I am euphoric

Being able to time travel implies he could also jump forward in time (e.g. to check his posthumous reputation).