Is this what you're referring to?
https://forums.frontier.co.uk/showthread.php?t=2714&p=2445277&viewfull=1#post2445277
he also claimed to have found a UA floating in normal space outside an orbis station:
https://forums.frontier.co.uk/showthread.php?t=156407&p=2391154#post2391154
and we all know that just doesn't happen.
it's also not the first time he's claimed to have seen something moving too fast to catch. from September 2015:
https://forums.frontier.co.uk/showthread.php?t=181240&p=2790913&viewfull=1#post2790913
3 strikes, I for one do not believe this guy.
You really are Yoda. + rep