My initial reaction was to suggest, "Nah, they wouldn't be interested." But then perhaps they would! However they like to "Bust Myths" ie. investigate some controversy or other. What better controversy than whether a slinger could in fact take out a skilled warrior with a shot to the head? In other words a dispassionate secular look at the DvG controversy. That subject often gets people hot under the collar even on this site where we generally know about a sling's capabilities. It's been done before but usually by religiously motivated groups who like to put their own spin on it which may not be generally acceptable.

Playing cards are moving well, maybe it's time to dust off the slinging gear...

204fps (139mph). Sling speeds can get considerably more 'out of hand'.

It works via light sensors exactly one foot apart. You get a LOT of errors unless the card passes level over the sensors.  It actually works best when just the advancing or retreating edges catch the sensors.  High speed video from a cell phone camera can also be used to verify speeds.

Should try it, it's a real hoot.  It's a fun but laborious way to chop vegetables for the stew pot. lol

MitchInTheGlatrix wrote on Aug 6^th, 2020 at 2:24pm:

Is that a thrown speed? How are you getting a card to 139mph?

The card would have to be as big as the distance between the sensors for that to be picked up.  Since it uses sensor separated much by several card lengths, any spin would be averaged out to some degree. If it were a radar gun and just picking up all of the doppler shifts that occur from reflected waves, then maybe it would see the spinning as increased (and decrease) velocity, though I doubt the cross-section is big enough for the card edges for this to happen.

I believe your reasoning is incorrect, but without a chronometer to test, I can't know for sure. If I had a chronometer, I'd certainly run this test to make sure I understood its limitations.