HD I remember similar situations back before Maastricht UACC existed and we were still operating next to Brussels ACC on the top floor of the terminal building there. A departure EBBR to ELLX (already refused due traffic) calls on the freq. climbing into the Upper Airspace. Planning Controller, Willy Withofs, throws headset in the air and disappears through the adjoining door only to reappear, seconds later with an ACC controller under his arm, and beating him about the head with an FP strip. He then proceeded to smash the poor bloke's head against the (full) strip bay, screaming, "That's why he was refused!!!" The victim was released to wander home and Willy said, "While i'm up, anyone want coffee?" Happy Days; but to stop a repeat the ddoor was boarded up so we had to go down a floor, run the length of the building and go upstairs again. Too much effort so we stuck to verbal abuse.
Thread drift, not a lot of people know it, but one of the crews in the Tower at Zaventem probably had the unique experience of being relieved by helicopter when the building first was openned back in the 1950s and a fire had cut them off. The stairs on the internal stairways were (still are) made of wood.