There was a Proto Trench Match in the S-staircase Clare base of a rather notorious mafia in 1999.

This started with people taking random pot-shots, as one does, promptly escalating to barricades being erected across a doorway and at the back of the large adjacent room. After numerous exchanges, improvised WMD's like socks filled with shaving foam began to appear. Was notable for ending with an extraordinary kill - Maz "BOFH" Isalski left the room and got Ed "Overkill" Anderson from the courtyard with a juggling ball through a barely-open second-floor window!