Angelo was training as he relaxed his body by the koi pond getting his spiritual pressure under control getting his pressure even lower. His spiritual pressure was low and would only be detected by a skilled fighter like the captains. Angelo would still need to practice more but he would need to get some work done, he soon got up and went to find the head captain. This time he would obviously knock before entering, Angelo just needed to do something to put his training to real work instead of trying to sneak up on the captain again. Obviously that got the captain mad at his failed attempt but Angelo wouldn't stop trying to get better and learn his bankai someday to take the captains spot...