Unlock the bike lock: Listen & Download Unlock the bike lock .mp3 Error! Change your browser, please! ⇓ Download Board falls ⚠ Blow into the microphone ⚠ Removing the napkins from the box ⚠ Ice crushing ⚠ Items fall on the carpet. ⚠ Sand bag ⚠ Makes sounds, The robot moves ⚠ Chemistry, boiling liquid, burner ⚠ Stir the liquid in a beaker, Chemistry ⚠ The noise of the great hall ⚠ Ice crack ⚠ Bicycle rear wheel ratchet ⚠ ★★★★★