I wish you'd have said that in your original post would have saved alot more time. No worries though.

Just add .notice Panic $nick used the part command in # inside the if statement, after part $chan.

Code:
ON *:Text:!part CrazyMan:#:{
  if ($nick isop $chan) {
    part $chan
    .notice Panic $nick used the part command in #
  }
}

Like so.

But that really is pretty basic stuff, you should refer to the bible first. I mean help file.

On a side note, when posting code on the forums it makes it easier if the code is inside the code tags. Which is the # symbol inbetween quote and php tags.