Like when the tank tanks Ravana near the wall and he destroys it and then gets knocked off by the first Tapasya hit that you can't dodge
Okay I know it's been awhile since I've done Ravana, but I don't think Tapasya does a knock back, or if it does it isn't much of one. Again though, it's been awhile since I've done that fight.
That said, yes if you go into Ravana without using your head you're likely to get flattened, knocked off, etc etc. Though I might note that I was originally talking about non-EX trials raids at sixty. I did specifically say that if you were going to do Relic Reborn again you probably wouldn't want to tie it to trials that were Extreme level.
The difficulty of the original HM's is about right for that sort of thing, sans Titans ringout mechanic.