Once in TF2 on 2fort, I, playing as an engineer, together with another engineer, built an impassable defense near the intelligence and Heavy comes from the side passage and guess what, there was a medic with an uber charge with him. The entire defense collapsed in a flash.

Another time I remember how once I was forced to sit on a turret near intelligence all the time because of Batman... This is a soldier with the nickname Batman. I used teleports as an alarm system and set them from both entrances, the entrance from the base, the exit from the courtyard, although when a spy attacked, it was not so useful. in general, it seems like my team won then.