b"Suppose someone builds a wall. A great and tall wall that is both impenetrable and beautiful. Who knows\\u2014maybe it's even solar powered. This wall stands 10 meters tall and goes on and on and on. Now suppose someone wants to toss a bag of stuff over that wall. A big bag with a mass of, oh, 60 pounds. (I will say 27 kilograms, because kilograms are better.\\nLearn more about your ad choices. Visit podcastchoices.com/adchoices"