Press your keybind (default: `) and ragdoll in front of your friends! Or just yourself, if you haven't any friends. But that's okay, we won't judge. The duration of your ragdollery is also configurable in case you just want to lay there for a while.
You could press space to skip the startup intro, but you are an busy person and need those extra couple seconds. Overrides the startup intro so it never appears.