I always wondered what would have happened if in the 1930s, someone had given Keaton a 16mm camera with plenty of film and told him to use his imagination and make movies with no particular budget. Turns out, he practically did just this by making films for the "Educational" movie company. Most of these little films are quite enjoyable; they just don't have the budget for any beauty, special Keaton effects, or no-holds-barred creativity. "Three on a Limb" is a good example. The action is a little subdued for a while, but when the pace quickens, it is really very, very funny. And Keaton leaps and falls and climbs and gets cast around like he was a teenager. The only disappointment is that often these movies seem to run out of film before he was able to improvise around enough to find the right final joke to a sequence, and in this case the dénouement appears without giving us the climax, so the expected Big Laugh doesn't arrive.