A Touch of Gas

It was a point of pride among Hogwarts’ amphibious community, that Trevor had shattered the school record for loudest belch within mere days of his arrival.

Unfortunately, from that point onward, Gryffindor's head of house strictly forbade Neville from ever again sharing his fizzy drinks with Trevor.

The Topsy-Turvy Tales of Trevor the Toad
-Excerpt from Chapter 3: All Aboard the Hogwarts Express