I just can't see Clark getting that jealous about Lois' unorthodox methods of going undercover. Surely he knows that Mad Dog Lane will do anything to get the story? But I do love that his attraction to her was the reason why he was so jealous. Total Clark.

Clark: "You don't even know the meaning of the word 'humility,' do you?"

Lois: "Never had a need to find out its meaning."

"Curiosity... The Continuing Saga"