There is an agonising pause as a trio of adjudicators, sitting shoulder-to-shoulder in the centre of a large Celebrity Squares-style grid, looming over the stage, exchange a series of important-looking nods.
Finally one of them hits a button and the whole thing lights up green. Christopher breathes a sigh of relief and allows himself a tiny smile before turning and walking back to his seat. He is through to the next round.
The gut-wrenching tension and drama is similar to watching a penalty shootout in soccer. So simple, so unforgiving: get one letter wrong and you're out. In the US the Scripps National Spelling Bee finals are broadcast live on ESPN and unfailingly provide some of the best sporting theatre of the year, even if spelling is probably not technically a sport.
The New Zealand Spelling Bee has been going since 2005. Founder Janet Lucas, one of the three adjudicators in the Celebrity Squares, got the idea after seeing the documentary Spellbound, which followed several contestants through the 1999 Scripps competition.
Sponsored by the Wright Family Foundation, it is open to Year 9 and 10 students who first complete a written test before the top 200 advance to regional semifinals. The top 36 spellers from around the country then progress to the national finals.
This is the first year the finals will be broadcast on television. In a pleasing example of circularity - or maybe just lack of imagination - the show, like the documentary, is called Spellbound.
Host Toni Street suggests two main reasons why spelling makes such compelling television: "It's the different characters," she explains, "and the complete pressure cooker they're under." Though the format and execution of the two competitions are quite different, these two ingredients are as evident at the New Zealand Spelling Bee as they are in its big American counterpart.
The characters in the first semifinal range from cool, half-asleep Vishva to nervous, perpetually-jiggling Peter. Luke bounds up to the podium like a golden retriever puppy; Amy approaches it as if entering room full of ghosts.
As each one spells out their words - juggernaut, concierge, kitsch, battalion - the room holds its breath. We're all nodding along with each letter, waiting and hoping everything will go green.
SPELLBOUND
When: Sunday, 7.30pm
Where: TVNZ1
What: Educational entertainment