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I take it these are the same guys who threw a sawblade through a 2x4 and exhibited X-tr33m Tape Measure Skillz?

And would you look at that, here's a video of them practicing their nailgun skills.

they needn't guarantee that the invention will prevent ever injury a sawblade could cause as long as they don't claim the product will do such.

there is massive potential for similar products in highschool shop classes, lumber mills, etc., where staying up too late playing nintendo or missing your morning coffee can lead to lifelong deformity.