[the1weasel]

I may be mistaken, but on the Scolopendra (ITL, p. 95) entry, it does not specify if the -2 DX is cumulative with additional bites. If it is, I would suggest the same rule applies from Rope spell "If a figure’s DX is reduced to 2 or less by a rope, he falls to the floor, helpless." (ITL, p. 23).