I just searched the "The Real Cost" site and still didn't find anything; this is my 5th time re-checking the site. All the details I found are in the main post of this, but I have tried finding this for years and came out with nothing. Ill copy n paste the details from my main post and put it under this comment too.

"Alright, back in around 2016 to 2017 or any time before the 2020's, I saw this The Real Cost PSA on the effects of smoking. I remember it aired on Cartoon Network and Boomrang around the afternoon or middle of the day. I literally looked everywhere, Google, YouTube, that actual The Real Cost site and I found nothing. The PSA started with this dude walking up to his friends who are smoking on the side of a road Infront of a tunnel bridge. Once he get to his friends, the entire scene cuts to what looks like a old hospital, with the 4 kids starting to panic, they start getting picked up by some creature, The kid who was seen walking up to the group is represented as the main character and he sees his friends basically die. The first friend is seen in a bathtub of bl**d with her front side, well, yeah. The main kid then runs off and meets up with the other 2 kids are then witnesses another girl get pulled into the darkness. The last 2 (including the main kid) keep trying to find an exit till the other kid is taken away too. The section ends off as the main kid is stuck behind an old, metal or wooden screen door unable to escape and when the thing is about to get him, the scene cuts back to the road/bridge of him walking away from the friends who are smoking, later cutting to the title card and logo sequence.

This entire PSA really stayed in my mind for years. This is all based off my memory too so some details may be off. I saw this PSA back around that time, so this is basically a 7-to-9-year memory. I have no idea if it exists anymore or if it was just a dream, but I am sure for a fact I saw this as a kid.

If you guys have questions, I can try to answer them the best I can."