Ah! Good thread. I would build myself a flamethrower, because it's very hard to kill flying/leaping creatures with anything else. If possible, I would move to a super cold, snowy spot relatively nearby (Mt. Rainier would be excellent). Let's just hope whatever biological anomaly made them gigantic didn't also make them warm-blooded. Additionally, I'd find myself a nine-pound hammer for close combat. Bladed weapons wouldn't do much good against a thick carapace, but cracking the exoskeleton in a few places could cause internal bleeding--many insects don't have blood vessels, instead their blood just sloshes around in them. Plus, it's a giant hammer. A useful tool to have about, whether boarding up windows or splattering gimondous arthropods.
Souplex said:
What aboot my let physics kill them plan? Without any internal support the exoskeleton would cause them to crush themselves if they were to reach threat to humans size.
One would assume that evolutionary mutations solved that problem, else we wouldn't have to worry about them in the first place. Perhaps a reinforced exoskeleton, tougher muscles, or even a rudimentary endoskeleton?