Nelson is also a natural athlete. In the episode "Bart Star", Nelson almost singlehandedly carries the entire Springfield Pee-Wee football team. As the team quarterback, he also on one occasion catches his own pass and plows through the opposing team with extreme ease. In various episodes, he gives out the impression that he is a lot smarter than he may first appear. Nelson often points out painfully obvious things to adults and kids alike that take them longer to grasp. Another example is a running joke where Nelson does a class assignment that is implied to be of high quality. However, he is always brushed off by the teachers before he gets to show them his work. Another running joke, though, is Nelson presenting ridiculously simple assignments, such as repeatedly showing a can of tomato paste in Show and Tell, and a presentation on "The Grapes of Wrath", consisting of himself crushing a bunch of grapes with a hammer, stating "Here's the grapes, and here's the wrath!" In later episodes, Nelson shows signs of being a tormented artist type, even submitting a film to the Sundance Film Festival about his life as a child living in poverty with a single, unfit mother and no strong father figure. He memorably says in the documentary, "I like to cry at the ocean, because only there do my tears seem small."