It's Spring and Hailie's outside swinging, I walk right up to Kim and kiss her
Tell her I miss her

from Eminem – When I'm Gone Lyrics on Rap Genius

Meaning

Again almost as metaphorical as the previous line:
“It’s Spring..” spring is always referred to as a fresh start. Eminem is known for being meticulous about word placement.

Notice how the swing appears in every verse, but each time the scenario portrays increasing serenity:

These changes through the song show Eminem gradually tearing away from the stage life and being there for his family instead.

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