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Dropping sand
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Land yacht model
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Slinky drop
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Walking Slinky
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Walking slinky (slow)
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Erwin lives on ...
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Erwin is "taken up" ...
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Water balloon face bounce
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Water balloon drop (symmetrical wall tension)
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Water balloon drop (asymmetrical wall tension)
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Twirling moth (half speed)
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Four antinodes (... at half speed)
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Six antinodes (half speed)
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GPS satellite orbits: cross view 3D
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Angle of repose
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Thai style six-manpower pile driver
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Wing waving Sepsidae (~2 mm)
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Home-made compass waving about
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Leg waving fly
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Calvatia craniiformis (shedding spores)
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Lunch cooking (Pizza oven)
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Sphaerobolus stellatus: cannon fungus (2 mm)
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Water and sunlight
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Daughter and granddaughter ...