I got hit with this Thor drop build on ladder yesterday and at first I thought it was just a retarded troll build. But then I realized I lucked out and decided to just 1rax FE into pure bio for the fuck of it (turns out 1tech 2reactor rax completely shits on a single Thor, go figure.) If I did my standard 13gas 1-1-1 cloak banshee/siege tank push the Thor drop build would have absolutely crushed it. I may try experimenting with it if I notice the opponent went gas first which implies some form of Star play.