I would've assumed George Lucas' foley had more advanced equipment than this, but judging by how convincing these junkpile-produced sound effects are, maybe not by much. BWAA!! BWAAAA!! etc.
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Before diving into the toy cabinet, remember: this will make a lot of noise, attract people to the scene, and leave you in the awkward situation of explaining to your wife/mother/terrified child that "no, it's ok, I'm just recreating the blaster sounds from A New Hope from scratch, because I do that kind of thing. [CollegeHumor]