After intaking a long breath the man could only sigh as he knew what he had become. However, to be completely sure he approached the nearby river and saw his new face for the first time. Truthfully, he was a bit surprised but did not show it as he was expecting it. He had become Yajirobe from his favorite manga/anime dragonball. Unfortunately, he began to worry. In the Dragonball world at least after the saiyan saga most enemies could eliminate planets while buttering their bread and drinking tea! The only way to not die and be swatted like an insect was to become stronger.
Yajirobe was a strong character but, in the current Yajirobe's point of view, Yajirobe wasted his enormous potential. After all, in the original series Yajirobe was a very powerful character but due to his lazy attitude towards life his strong physique never improved. Yajirobe could have become a much stronger and a much more important character after the events of the piccolo saga and not die multiple times. Furthermore, in the series he could have even studied martial arts but he did not. In the current Yajirobe's point of view he could've become even stronger than Krillin!
After thinking through the flaws of the previous owner of the body and the future potential dangers he began to follow the stream as it was the most efficient way to both train and find a village or city. A better way to train would've been adding weights but he currently didn't have the luxury of having some. Instead, he lifted up a large boulder and started running upstream mirroring Goku and Krillin's milk delivery training but harder.