second panel:
bafu bafu - thud thud / baf baf

fourth panel:
zuun - Often describes things sinking

-translation from thejadednetwork site

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"ザングースさん(年上)
おじさんをなんだとおもっているんだ！！"

"Zangoose-san (older)

What do you think of me as an old man?!"

-translation from google