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My friend Nathan, utterly enthusiastic (maybe actually *too* much, Nathan! :)) about a numerical semigroups seminar.
A skydive from 16000ft lasts only one minute. In that precious time you can screw up in a hundred different ways. There are a thousand different ways to screw up a drawing in one minute, and this is a catalog of a few. I shall draw you on the beaches, on the landing grounds and on the hills, and I shall never surrender. And you will comment on how "Meh, it's ok but it doesn't really look much like me", 'cause everyone's a critic, goddamit!