The drop was not caused by Mike Hearn.  Hearn made the drop worse and accelerated it, but it was not caused by him.  His post could be summarized as him claiming Bitcoin has failed if the blocks become full, but blocks were always destined to become full and reach a fee market even if you raised them to 32MB.  His post made zero logical sense, to the point where it was basically propaganda and someone at R3 probably paid him to make it.

Now, onto why the drop actually occurred.  The drop occurred because....drumroll....TA.  Look at my chart and post before I even heard about the Mike Hearn deal.


Lol at your chart and forecast.

There are lots of traders who called this move waaaay before 2 weeks ago. eg Adams Bit's Movement post #24

https://bitcointalk.org/index.php?topic=796276.20