I swear this is my last run of this level. Sorry moderators for submitting so many runs of this. Anyways, I actually got proof of this being on UV. If the cyberdemon rockets were to shoot me while in Invulnerability, I could get some speed from the damage boosts, which could result in a shorter time. But, that has never happened to me. I did get a 00:16:29 run on ITYTD, but I didn't want to upload it because ITYTD is for babies. Anyways, yeah lol :))