[TF2] [EXPLOIT] Broken shutter doors near drops from both spawns on Helltower can be opened by both teams

[KimmyTF2]

Upper parts of shutter doors near drops on RED and BLU spawn can be opened by both teams if a player manages to glitch their way past respawn room visualizer.

Video by slender showing the exploit on Casual server. This bug is still present to this day.
https://www.youtube.com/watch?v=texDqEXuEmM