You were walking in City Z. You hear fast footsteps and yelling. You look to your left to see a bald man, in his pajamas, with bug spray, chasing a mosquito.

Saitama: "GET BACK HERE, DAMMIT! YOU AND I AREN'T DONE YET, YOU LITTLE BASTARD!"

As he continues chasing the mosquito, most people are looking at him weirdly or trying to go on with their lives. You just laugh. That defiantly made your day.