I built one of those many years ago and it has been quite popular over the years. The illusion is disturbing for some, as you mentioned, but more in a 'wow that is neat and weird' way rather than a bad way.:D
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~Doug~
AC010505 EAMUS CATULI! Audere est Facere THFC 19**-20** R.I.P. it up, Tear it up, Have a Ball
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