I was playing through Normal Forest II, and decided to play Eren to just have some fun in the forest and kill a whole bunch of titans in a 1 man room solo run. At the end of wave 10 however I was attacked by a crawler, and panic buttoned out my transformation. Instead of transforming though...well...
http://imgur.com/a/MzFpn
Essentially I made an invincible Rogue Titan clone that I could control remotely, but unlike the earlier glitch that enabled this due to disconnections of Eren players I had my titan completely under my control and there was no disconnect. This room was completely solo from start to finish. As well, it didn't impede my ability to reuse my own transformation at all. Naturally this meant I breezed through the remaining 10 waves without actually killing a single thing with my swords.
As cool as it is to just occasionally have multiple invincible titans on your side, this seems like something that should probably be fixed. Especially since unlike the disconnect titan bug, this one can be done solo.