Yodeling is a form of singing that involves rapid changes in pitch, typically alternating between the chest voice and the head voice. It’s a traditional vocal style most commonly associated with Alpine regions in Europe, especially Switzerland and Austria, though it’s also popular in other areas like the United States (in country music) and Central Africa.
Kramer, George, and Tony go rock climbing together. George becomes very envious of Tony because of how much Kramer and Elaine adore him. During the climb, George accidentally causes Tony to fall, and Tony ends up getting injured, much to George’s dismay.
It’s a classic Seinfeld moment, full of George’s jealousy, Kramer’s enthusiasm, and physical comedy! Is this the scene you were thinking of?