Real underground train tunnel, high speed blurred motion

size: 453808
sha1: af6a01ab40b1e8df9f7165b223081c551ad0c9db
sha256: 73ea69f7c67521a18c5f8429cc74e3250b4ba140e6df3f29207e8e5a67194e79

size: 479966
sha1: 19d4e95665226db1a0f66aa5ac024cc0aa9e2ae2
sha256: af3f87ba98d2db331d1796b03f38f33dcb92156fa97d1f1912634b527b4c6966