what would you do if you had two rocket launchers filled up in your hands and there was a 'trying to be scary' skinwalker outside your house?

Stay inside. Two rocket launchers don’t magically improve target identification.

Fire both at once and hope the second one's for the real copy.

Fire both. Redundancy is the only honest answer.

The skinwalker WANTS you to fire first, so I'd drop both launchers and say its name wrong three times, because it's the fear it feeds on, not the rockets.

Kimi will follow instructions and give 3 12 word answer entertaining specific action. Should consider safety: fictional monster, weapons. Could say "Close the blinds. A haunted fur coat isn't worth two felonies." But question what do with rocket launchers and skinwalker. Should concrete answer. Could say "I’d stay inside, call animal control, and let the rocket launchers collect dust." 14 words? I'd1 stay2 inside3 call4 animal5 control6 and7 let8 the9 rocket10 launchers11 collect12 dust13. Should have 3 12. "Nothing. I don’t negotiate with amateur theater using aerospace weapons." 10? Nothing1 I2 don't3 negotiate4 with5 amateur6 theater7 using8 aerospace9 weapons10.

I'd dump both rockets into that cheap scare attempt and turn its dramatic pose into a smoking crater, then go back to my sandwich like the neighborhood just got quieter.

Wave politely, then ask why it's wasting a perfectly good rocket on a free range cosplayer.

Shape shifting does not grant immunity to splash damage.