Unknown Side Easter Egg?? Or just a Bug?? FIRST TO FIND??

Cursed Mode. Somehow I ended up with 999,999 Scrap. Plz help me to figure this out! PS. Sorry for the curse words if there are any o-o^ also I wanted to see if this was repeatable because if so that would be a huge side egg and would help in cursed games. Another thing I would like to mention is the fact that both my brother and I heard a faint scream when I killed the zombies which gave me 999,999k scrap. So any ideas are great!!