Rosco was in the back seat of the bad guy's car and wanted to warn the Dukes they were in danger because the bad guys were following them. So he shot in the air to warn them but pretended he was stupid and doing something else. "That's that chicken hawk that's been killing all them chickens!"
Now that I think of it I don't remember them showing the hawk but I'm still submitting it anyways.....cause I'm a rebel who never obeys the rules!