Whether they be Acolytes attempting to flush nefarious conspiracies from the Underhive, the fortune-seeking Rogue Trader and his/her retinue of trusted officers and savants dealing with resistant or hostile natives, a cadre of Deathwatch Space Marines procuring some long-lost relic from a Genestealer-infested Hulk, or a motley band of Renegades and Apostates attempting to kidnap the effeminate prince of some posh planetary Lord, there are times when PCs will , at times, find themselves in an unforeseen circumstance where their resources are nearly depleted and they are grossly outnumbered.
Combat Action: Torrent of Fire (Full Action)- A PC may, if he/she possesses a fully loaded Basic or Heavy ranged weapon with the full-auto RoF, unleash an indiscriminate torrent of fire in an attempt to buy a few more precious seconds of life (much like that poor bastard with the mini-gun in Predator). In desperation, the PC may make one BS Test (per target) to hit any and all targets, friend or foe, within the Short Range of the weapon being fired. This BS Test is made with a -20 modifier, and cannot be used in conjunction with any form of sight/targeting device, nor may he/she use any of the Aim Actions. Starting with the closest target, the PC Tests vs. his/her BS; if a hit is indicated the DoS are calculated as normal, but the number of hits from this attack will be halved (rounded down) due to the frantic nature in which the PC is spraying bullets/slugs/shells about. The PC then moves on to the next closest target, and continues in this manner until A- all viable targets have been attacked, or B- the weapon expends it's ammo supply. In either case, after the Torrent of Fire Action has been taken, the weapon's clip has been fully expended, leaving a smoking, heat-ticking barrel. This Attack Action has the added (possible) benefit of causing pinning (see applicable Core Rules), but may only pin targets (again, friend or foe) withing range of the Torrent of Fire attack. Fate Points may be used (spent) to increase the DoS an any one successful hit, but as only one Fate Point may be spent per PC Turn, and the PC is essentially putting himself "out for the wolves", he/she may wish to save it for responding to/surviving the retaliatory actions of his/her victims (friends or foes). Righteous Fury/Zealous Hatred works as normal with this Attack Action.
Obviously, friendly PCs should rush to clear the effective range of this desperate attack before it begins...a sort of "Go on without me!" moment.