Maybe Shun was just lucky, or maybe the repeated blows to her toned belly finally took their toll, but finally Shun got a good reaction. Almost immediately Vanessa's eyes bulged as she proceeded to hunch over, arms wrapped around her waist, and vomit out her lunch, getting more than a handful of "eew's" and similar reactions from the crowd.
Her face turned rather red, although Shun couldn't tell if it was from anger or blushing from shame. Probably both. The fact Shun was probably distracted by dangling ladybits probably didn't help either. Also the fact he was probably so drunk that he was wondering when the floor would cease moving because this was his stop may also have factored into things.