Maybe he didn't get enough sleep the night before. Lack of rest can cause headaches. Or perhaps he's been exposed to loud noises for too long.
It could be that he's had a long day at work or school and is stressed out.
Well, there are several possible reasons. Maybe he has a chronic illness that affects his walking. Or perhaps he's just really tired and his legs can't keep up. Another possibility is that he's pretending to limp for some comical effect in the cartoon.
Maybe he's trying to save her from danger or it could just be a romantic gesture.
The headache and odd eye in the cartoon character might be due to overexertion during an adventure. Maybe they were running around a lot and got exhausted. Another possibility is that they ate something bad that's affecting them. Or it could just be a part of a crazy cartoon plot!
Maybe he was bored or disagreed with what was being said.
It could be that he's sick or injured. Maybe he had an accident or caught a serious illness.
The bearded reconstruction man might be yelling because there's a problem with the materials or a setback in the project. Maybe he's also expressing excitement or surprise about a sudden development.
Maybe he got into a fight or had an accident. It could be part of the story's plot to add drama.
Maybe he heard a strange noise and was checking to see what it was.
He might be running away from danger, like a monster or a bad guy. Or maybe he's in a race and trying to win.
Maybe he's been playing too hard or staying up late. That could make him tired.