St. John wreaks havoc on the set, setting off a blow horn to scare the hosts and dropping pinecones on Paul Bissonnette and Anson Carter.
He ends the commercial setting off fireworks and sounding a siren while Liam McHugh, Bissonnette and Carter are having a discussion at the desk.
"This has nothing to do with hockey," Carter shouts over the noise.
"This has everything to do with hockey," St. John shouts back.
It looks like this is only the start of St. John's shenanigans at TNT.