Belching slugs

 

A loud bang echoed around the stadium and a jet of green light shot out of the wrong end of Ron's wand, hitting him in the stomach and sending him reeling backward onto the grass.

"Ron! Ron! Are you all right?" squealed Hermione.

Ron opened his mouth to speak, but no words came out. Instead he gave an almighty belch and several slugs dribbled out of his mouth onto his lap.

***

Harry Potter and the Chamber of Secrets, Chapter 7: Mudbloods and Murmurs