Hej Arnold! Sezon 1 Odcinek 9: Mugged / Roughin' It

Arnold learns the secrets of the martial arts from Grandma after getting held up for his bus pass. Arnold is transformed into a Karate Master, but is overcome with his newfound power. Arnold becomes too cocky with his abilities and is ready to beat up anyone who crosses his path. Arnold has to learn the hard way that with great power comes great responsibility. Grandpa takes Arnold and Gerald out to the woods to show them how to camp "the old fashioned way."  After a grueling day of setting up camp and learning basic survival skills, Arnold and Gerald come to the conclusion that "nature bites."  Meanwhile, Helga and her father are getting back to nature in high-tech style.