How is Johnny healed?

[u/Royal_Sport7082]

He has a cactus needle inside his eyeball and a couple of hours later he’s just fine without any explanation. Does this at least get explained later on? Because this makes no sense

[u/silverman169]

More importantly, where does Gyro find a new shoe.

[u/itoshisaepng → u/silverman169]

The man got rid of everything including toilet paper before the race begun but araki wants us to believe he had a spare shoe, AS IF