What is the reason for an old man studying cartoon?

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.

Perhaps the other man did something wrong to provoke the old man. Or it could be part of a comical and exaggerated scene in the cartoon with no real reason.

Maybe the man is studying cartoon to understand animation techniques or to create his own cartoon characters. It might also be for educational or entertainment purposes.

The cartoon old man might have bad hair because of a crazy mishap in the story. Maybe a strong wind blew it all over the place, or he got into a fight and it got messed up. It could also just be a fun design choice to make him more memorable.

It can be quite challenging. The businessman has to balance his work and study, and might find the cartoon study a refreshing but demanding pursuit.

The cartoon man might have stopped because he received some sort of signal or instruction. Another possibility is that he's having second thoughts about his actions.

Maybe he ate some expired food from Walmart's shelves by mistake. If the food was contaminated or past its expiration date, it could cause diarrhea.

Maybe he wants to hide his true identity for some secret mission or adventure.

Maybe it's a special effect or a part of a magical story. Sometimes creators use invisibility to add mystery or surprise.

It could be that he's had a long day at work or school and is stressed out.