Walk outside, and ask, in a really loud, clueless voice:

“Hi, guys! Watcha doin’? I’m just askin’, cuz y’know, you guys are out here, and I’m just wonderin’ why? Is somethin’ goin’ on? You guys on official business? Who ya aimin’ at? Can I get look? I’m never looked through a scope before, I bet it’s wicked cool, can I try? You guys need anything? Water, Doritos? Need to use the bathroom? I bet you do now that I mentioned it, huh? Isn’t it funny how that works? So you guys going to be around all day? That’s cool, I think I’ll just hang out, and keep you guys company, I’ll go get my folding chair, sure I can’t get you anything…”

They’ll leave.