Just before Yeung Gor and Little Dragon Girl met South Emperor 1 Deng and Chi Yan (the monk formerly known as Iron Palm Union Chief Kau Cheen Yan), they encountered the traitorous Elder Pang of the Beggar's Union and his assistant, a beggar named Ma. The couple eavesdropped on the traitorous duo and learned of their evil plans (as well as their intentions to murder each other). Yeung Gor quickly subdued Ma, but instead of killing him or exposing him, he and Little Dragon Girl turned him into a snowman (i.e. they encased him in a shell of ice and snow). Later, Chi Yan became the one who finished off both Ma and Pang.
Why did Yeung Gor and Little Dragon Girl turn Ma into a snowman instead of kill him? It was the weirdest thing to do (and one of the few moments I actually liked them; it was good to see them do something wacky and humorous like this instead of the usual mushy stuff).