Mailbox Opening, Closing: Listen & Download Mailbox Opening, Closing .mp3 Error! Change your browser, please! ⇓ Download The creak of the gymnastic horizontal bar ⚠ Falling object on a metal surface ⚠ Kick on the car ⚠ Metal trolley ⚠ Roll a metal barrel ⚠ Bumper strikes ⚠ Unscrewing and twisting the lid of the metal ⚠ Drop an empty metal canister ⚠ Squeaking metal ⚠ Rattle of metal, Drop ⚠ Ringing chain ⚠ Creaking carousel ⚠ ★★★★★