"Ah!"
It was too late by the time Bohemia cried out in alarm. Her foot slipped, and she stumbled and tumbled into a corner, not stopping until she slammed into the plastic wall of the inflatable sac with a THUD.
"Didn't we tell you," the hairy man in red droned from behind a thicket of hair like a briar patch, "to stop trying to find your balance in a ball floating on a river? You should lie down too."
"No matter how strong your ability is, you can't defy the laws of physics," the hairy man in green added.
The pair of twins had their limbs spread out, lying flat against the bottom of the inflatable sac. At a glance, they looked just like corpses. Whenever a wave hit the spherical sac, the current would send them rolling all over the floor along with it. But they remained perfectly calm, as if they were just dead weight thrown into a leather ball, tumbling back and forth without being affected in the slightest.
'Bohemia couldn't stand this.'
