is anyone going to tell him there are no blades on that lawnmower
But he’s so happy
OH MY GOD! I never noticed that before, but I always wondered why he offered to mow a lawn that clearly didn’t need to be mowed, but the bladeless mower makes it all a little clearer. It’s a joke on him, played by his own brain. The whole place is nothing but a fantasy triggered by the Djinn and since he’s hasn’t had a home in over two decades, he doesn’t really have much of a frame of reference for it. But he’s built up an ideal of what that family home would look like, tacked together from bits he’s seen on television and from families he’s met over the years. His brain says this is his family’s home and a home has a lawn that need to be mowed. So he says the lawn needs to be mowed and he mows it (but with a mower that can do nothing), to be helpful.
But the lawn doesn’t need to be mowed. His mother didn’t need his help. His brother could hardly disguise his dislike for Dean. Because even in Dean’s head, “…the truth is they don’t need you. Not like you need them” (1x22). And that pointless lawn mowing is just his own brain mocking him, telling him he’s useless.