I was running the NF on Hero just for the weeklies and noticed an absurd amount of +10000 odd score popping up now and again after killing enemies. I can't seem to pinpoint it to anything specific to trigger it but my teammate and I ended up with 487,128 and 372,876 respectively. Whereas the other had 86,908. I assume this is only visual in some aspects as the NF screen shows 106,198 as the actual points. Sorry for the naff photo the camera doesn't do well in bad light.