"Okay, now you're making your escape in the sidecar rig, and... you're being chased! Oh no! Get ready to destroy them, Pontanis!"
Angie (in the sidecar) is wearing the only real, fully-functioning Ultimate Water Gun; Helen and Tara are wearing dummies. The tank is strapped to the back of the sidecar, and she's getting ready to pull the trigger on it. It tends to snap your head back a bit.
Angie went to millinery school, and made both this costume, and the blue Flash Gordon ones in previous pictures. Plus she books their appearances. They work hard, those Pontanis.