別に~ない => not really, not particularly N3
は別として => aside from; apart from; except for; whether or not N3
~ひょうしに(~拍子に)   => the moment [A], unintentionally / inadvertently caused something to happen N1
~はめになる(~羽目になる)     => to get stuck with (some job); to end up with (something unpleasant) N1