Orfe are notorious for jumping out. If the weather ever gets stormy, the oxygen gets depleted in the pond and orfe hate it. Why it has chosen to jump out now i don't know but they will find the smallest of gaps believe me.
I lost a stunning koi by jumping out last year. It was a colour that i've never seen before and never likely to see again and i was gutted.
Oh....and a 7lb orfe ?????......the record for orfe being caught on a rod is only just over 4 lb. I have 10 orfe at work...all over 12" and would say they're about 2lb each.