Five Science Stunts Using Dry Ice

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Grant Thompson, a/k/a The King of Random, seems to have a "thing" for dry ice. He even used it to do an ALS challenge video earlier this year (and burned himself in the process). His particular dry ice passion/pathology continues in this video, as he messes around with the stuff five different ways (and utters a "don't try this at home" for several of them). -Via Science Dump


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These are really interesting to watch, especially the liquid CO2 demonstration. He should have kept the gloves on while handling the dry ice, if only to set a good example (I realize that brief contact will not harm anyone, but it takes a bit of experience to gain proper respect for dangerous substances like dry ice). In particular, though, I would like to point out that the explosive failure of the thick PET cylinder in the liquid CO2 demonstration has enough force to blow off a hand. Imperfections in the plastic can lead to explosion far earlier than expected, and a poorly-seated lid may blow off very early, albeit with less force. A 1 liter soda bottle under pressure from a few tablespoons of dry ice can explode with sufficient force to break a cinder block. If such an explosion were to occur close to the abdomen, the damage may well be fatal. Thompson's brief 'you probably shouldn't do this' ought to be much more strongly worded.
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I am a master of cat petting and massage. It comes from years of practice, a high level of empathy, and always having mellow cats around.

Most people don't know how to properly pet a cat. No finesse, no dynamic feedback loop. I suspect these people are probably not great in bed, either. There's nothing sexual about petting a cat, but the parallel between being able to interpret responses to physical stimulation and adjust accordingly is there.

You have to imagine that you are the cat, and remember that what feels nice to a human is pretty much what feels nice to cats, the spine, neck, and shoulders being the obvious areas. Also, remember that less is more! A slow, light touch is almost always better than an aggressive one.

Ok, that's all, and yes i realize I sound like some sort of cat molesting pervert.
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It also depends on the cat. Some cats like belly rubs, some don't. Some cats only tolerate soft and slow pets, and some seem to enjoy rougher or faster petting. Which seems weird, but you can see examples of all of those on youtube.

Cats are weird.
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