Hmmm.
Do they go tick- tick- tick,
or thud- thud- thud- ...
Bigmike1
Loc: I am from Gaffney, S.C. but live in Utah.
I laughed out loud when I saw this. It brings back memories of my teaching days of forty years ago now.
That looks fairly harmless, but I can think of some other experiments that might cause concern. I wonder what kind of noise they make.
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