The below video is summed up best in a quote from Insomniac Games creative director Marcus Smith. "I think that it's just kind of in our company culture at this point to come up with crazy weapons."
Truer words were never spoken. Between Resistance and Ratchet & Clank, Insomniac has built up a legendary armory of completely implausible weapons for taking your enemies apart with. That fact is celebrated in this featurette, complete with sprinklings of Resistance 3 and Ratchet & Clank: All 4 One footage, which bring out a whole new arsenal on September 6 and October 18, respectively.
Source: PlayStation Blog