There was another fight breaking out in here, he could hear it. Did people from other worlds just not understand how to bathe or something? Crazy people. Usopp groaned in pain and rubbed his poor tailbone...

Then Luffy's face descended into his vision, and Usopp's lips puckered with a spluttering noise for just a second before he cracked up with laughter, smacking his fist against the tile in violently mirthful appreciation of the deadpan delivery. Now that was humor!

"Bu... bubblebeard!" He agreed as soon as he caught his breath, and reached out for Luffy's arm to help haul himself up.