Strange object becomes a hand when viewed in cylindrical mirror.
And here's one that becomes a frog:

www.youtube.com/watch?v=UCTQ-mfVxvA

The face things on his channel are pretty cool too.
( Dawn Of The Bread $$$$$$$$ E-THUG 4 LIFE $$$$$$$$, Sun 3 Feb 2013, 11:03, Reply)

I like those
I imagine some people would walk past 'The Thinker at Tower 42' and not realise what it is.
(Sherbets Leaf, Sun 3 Feb 2013, 11:15, Reply)

It's facing the door so i think you'd get a bit of an idea as to how it works.
Must have taken quite some time to get it all right.
( Dawn Of The Bread $$$$$$$$ E-THUG 4 LIFE $$$$$$$$, Sun 3 Feb 2013, 11:18, Reply)

both of those are cool!

( miss fortunate everyone you knew was sniffing glue on, Sun 3 Feb 2013, 12:16, Reply)

Rick Wakeman
etc...
(GforGermany will lick the fat off your bacon, Sun 3 Feb 2013, 13:19, Reply)

yup that's pretty cool :D
reminds me of those 3d chalk drawings that chap does
( lustreboy making himself laugh since 1973 (tm), Sun 3 Feb 2013, 16:56, Reply)