Take a set of files and sort by file size. Sometimes, the smallest files are invalid or incomplete ones. I can think of some 4chan torrent(s) where this is the case. I recently looked at Everfree_Radio_RIP -- magnet:?xt=urn:btih:4ce2cc82c906a383aa418b6a179dd26b25d8e26f&dn=Everfree_Radio_RIP&tr=udp%3A%2F%2Ftracker.trackerfix.com%3A80%2Fannounce&tr=http%3A%2F%2Fexplodie.org%3A6969%2Fannounce&tr=http%3A%2F%2Ftracker.tfile.me%2Fannounce&tr=http%3A%2F%2Fbigfoot1942.sektori.org%3A6969%2Fannounce -- and saw some invalid/incomplete files in there:
. "Steffan Andrews - Man of Awesome.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreiassdumn7j4pw7l5cfnpqi32le632qyuf6ol3mh2aijqiepxem7oa
.. https://arweave.net/BpFalDUUhjd0WHKd5tWXTSTSthCx-5kDu3aoyyQj8-s
. "StationID - Trevor Devall 4.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreicbcy7uiiofkvzfhalvlqc6hqhwvjaaue7m2io6zd2s5bqph7x6va
.. https://ntbta5vcbpgrmyskxufnnebr3wozjt44pjnp4fligx7uyaydqrja.arweave.net/bMMwdqILzRZiSr0K1pAx3Z2Uz5x6Wv4VaDX_TAMDhFI
. "Mixology - DJ Midli - Dr Mad Midlis Mad Machines running wild 3spoop edition.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreiah3ezhortbafsg43kywrkdmwpvee5azwkod63kfnqskza352jgnq
.. https://ar-io.dev/khBRYHlH5ho3I8kCdg3CpKHpNgzi2T65QmfTi82Ntik
. "Tara Strong - Take A Letter.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreiae3tdazokrg3whfh2x4x3rgdfwnz4dgan7h3b6bo6oxxxf233tvi
.. https://ghnso7knypzhknhrwsfal427dzk6icyavq5bg6ixxl4chhacqdfa.ar-io.dev/MdsnfU3D8nU08bSKBfNfHlXkCwCsOhN5F7r4I5wCgMo
. "Lee Tockar - Steven Magnet ID 1.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreidpp7io2uuhr45lrxi7z7ljqvfbkfamwi5xa3e47agxka3qcbaafq
.. https://15998603.4everland.store/Lee%20Tockar%20-%20Steven%20Magnet%20ID%201.mp3
. "Garret - Station ID.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreidwwyyrvrrqwbbques7und5xz27ciqmpseb2kttcepfyztujpbgi4
.. https://drive.google.com/drive/folders/0B38kVwl13cntajhYOWlBeXp5UkE?resourcekey=0-RaY4l9KR_fxioswD2mmLxg&usp=sharing
. "Armin Van Buuren - Going Wrong.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreiad7amf5lgoosxzbphvfjsfb5gslqzjou27l2ued3wkftvelk7xoq
.. https://iwiftp.yerf.org/Pony/Music/Fan-made/Music%20archives/Everfree_Radio_RIP%20%28incomplete%29/Everfree_Radio_RIP/Armin%20Van%20Buuren%20-%20Going%20Wrong.mp3
. "Will Anderson - EFR Station ID.mp3"
.. https://gateway.pinata.cloud/ipfs/bafkreian75dgloejr6ttwfk4o577kodxtgonsfxkxzpkuznj2vwal34hay
.. https://web.archive.org/web/20230327004510/https://bafybeibrcvt5jhzvln3r2xuwz26binkm6iru3fznwowjtvmseaitznrawm.ipfs.w3s.link/