I found this spot at the beginning of a level right after The Asylum where a guy would throw a grenade at me every time right after a checkpoint. It was a great spot to try that drop-a-grenade thing and then practice throwing them back too. It's the part right before you have to take on two mechs.
I'm working on Uber. It didn't seem too troublesome like you said. I'll get back to it to get those last two achievements in July.


