Someone named Rhyme2 found this and posted to Korean SC discussion website. Apparently you can use archon fusing/probe + mineral then spamming patrol to make the units cluster together in a small area, at which point you click recall and bring 2~3 times the usual army size.
Koreans are going crazy about this. Some are saying this completely changes the TvP paradigm.
Mod Edit:
On May 10 2018 18:14 f10eqq wrote: It's definitely possible in 1.16. Here's a video from 2016 well before Rhyme2's post.
If you successfully do one of those recalls into the Terran main, you have literally won the game, because it will take such a long time to clean it up. By the time it is cleared, a new one will come ...
TeamLiquid StarLeague 5 in 
EPT
