Had a similar TF2 dream twice. The story in both is basically the same except one time I "invented" surfing and the other time rocketjumping.
Something about certain people being able to travel to a different dimension where I and a few others have superpowers allowing us to basically do anything we want inside the dimension.
Somehow the world found out and everyone suddenly wants to kill us. We could only use these powers in the other dimension but obviously people don't want to take the risk of it being possible on earth.
So we're all kinda stuck there now because we fear for our lives if we return and don't want to put our families in danger.
We decide we need to show that we only want to use our powers for good so we start projects to share with everyone to show we only mean to do good.
I go to some flat desert area and start altering the laws of physics. People who are in that area can then move their bodies when airborne to move similar to airstrafing. Also there's some gravity things going on so if you're falling too fast it will slow you down so you don't die by falling from some place. In the version of the dream where surfing is possible there's also air accel. The rocketjumping version also had a Rocket Jumper.
I then put huge ramps all over the places. The entire thing kinda looked like one those combat surf maps with the starting point being high up in the sky so that's why the gravity thing was needed.
I only remember the thing I was doing. Don't know what the other projects were or who else was stuck in the dimension with me.
The next step was making videos of what we were doing to show the creative things our powers allowed us to do inside the dimension. Somehow one of us is then able to spread these videos everywhere on the internet even though every government is trying to block us. I thought we didn't have powers in earth's dimension, but whatever I rolled with it.
Luckily most people actually realise we mean no harm and the videos become very popular. Most people then start supporting us and there is an interest in the projects we made. My thing'd become some new crazy adrenaline sport.
We then allow a limited amount of people to also come to the dimension to see and test all the things we made. Last thing I remember before I woke up was convincing a television host (John Oliver? don't remember) who was filming an interview with me to jump from the highest point of my surf map structure as a way of testing if the gravity thing I made would save him. It did
Woke up both times before I could find out if we'd ever make it out without getting a nuke dropped on us