Ann: June 2018 Quarterly Results Presentation, page-5

I may be wrong... it has happened before...

But hammering a share price on release of results when the buy stack is thin is a fairly classic move... particularly if there's a results conference happening right at that moment. All the factors align for an awesome response to the triggers:
1) People haven't had a chance to digest the results, so they think somebody else has turned up a bad thing.
2) People who aren't tuned into the conference think something terrible has just been revealed.
3) The lines are thin so you can wipe out of a lot of them without having to risk a large short position.
4) The outlook for Regis is extremely strong so you can cover your shorts and still take a large position at a low buy price.

I hope I'm not wrong... I doubled my stake on the dip!