there was a story of how soros' quantum fund lost $60m in s&p futures in the week of the 1987 crash, when they tried shorting but their broker + 100 other floor traders reportedly colluded against them...i guess it was a crazier time
we had the same positions niederhoffer had when they broke him in 97 the margin when ballistic our principles owned their own bank and covered the margin call, then added to the position on the bounce. it was heady times in the pit days, heft and connections ruled your fills.
if you were big enough you could call and get your fills changed, they would call you back and make it right. as a individual i also experienced the other side of that getting a call that the fill i thought i had was much worst than reported earlier. ny was notorious for these antics.