Great Teacher Onizuka/Funny

"Uchiyamada: What are you doing? Onizuka: Nothing, just wetting myself. Uchiyamada: Very interesting."
 * So many from Great Teacher Onizuka, but one in particular sticks out in memory to me. During the Okinawa trip, Urumi realizes that Onizuka has been using the class as cheap labor to help him search for treasure. Getting Urumi mad at you is a Bad Idea. She buries Onizuka up to his neck and then  This troper laughed hysterically for several minutes.
 * Pretty much Azusa's every single Tsundere moment in the Live Action series.
 * Anytime Onizuka makes a funny face.
 * "GTO - The Legend Begins": Onizuka's Slow No as a dish of freshly made sushi he wants to eat is thrown away.
 * "Enter Uchiyamada!": This exchange: