I once recreated the subway "Bernie Goetz-style geek faces off with punks" scene from Predator II. Three targets at 1 to 3 yards, shooter with made-safe gun in briefcase on the lap, sitting in a folding chair.
Funny thing, even those who were laughably slow to present the weapon still hosed the targets desperately fast. Some from both the "fast" and "slow" draw groups STILL had invisible misses!
I like to approximate situations drawn from the current year's citizen and LEO shootings, occasionally using situations where there was no one to shoot back at the BGs.
Try replicating the LA bank robbery situation where the perps were wearing body armor, and see how many of the IPSC folks whine about 50+ yard head shots being "unrealistic" or "impractical!"