are you talking about flashing a recovery with a recovery? why it's not recommended? ...
sorry, I don't understand this part.
Yes, but more physical action. Sometimes manipulating the battery can get back into recovery. Cost nothing to try.
If the flash that recovery zip (overwriting the current one) and this fails. Brick.
If I am alive in adb and I flash_image the recovery .img and it fails, I now have no valid recovery but am still alive, and can then flash_image another that is known to succeed..
Problem is that our phones are restricted to a 5 meg recovery section. The dev worked hard to get the new CWM small enough (taking out some functionality such as partioning sdcards to do so), but it is right on the line. On some phones, unluckily maybe yours, it doesn't quite fit on. There is also a new TWRP recovery around, same restriction but maybe would be OK.