Simplify the following text for a Grade 8 native English-speaking person.
Original: Backstage , Triple H was having his ribs iced down when McMahon came in to inform him that Orton was invoking his automatic rematch clause for the WWE Championship , and that the match would be taking place later that night .
Simplified: A backstage segment took place , with Triple H seen having his ribs iced . Vince McMahon then made the announcement that Randy Orton was using his rematch clause to allow him a rematch for the WWE Championship that night .