Ok I just started watching bleach and i think i might have misted a bit or something but i was wondering when the main chacter becomes a soul reaper of his own power and gets his sword, Why does the dude that tolds him down in the hole have a horrifing look on his face when he sees bleachs sword??

if you dont know why could you tell me what ep it is in and i will watch again to see if i can find out thanks!!