Question: What did teams perform in front of a judge?
About the article "The Amazing Race 21", section "Leg 8 (Russia)".

Candidate passages:
Te Hui Ahurei a Thoe is a festival that was started in the year 1971 by Hon.
John Te Rangianiwaniwa Rangihau for the Ngai Tuhoe nation Iwi.
It is Biannually held in Ruatoki.
All kapahaka teams that come of the Tuhoe tribe Iwi perform their hearts off to celebrate all the years they have interacted with each other.2011 marks the celebration of 40-years of the festival.
The Tuhoe Ahurei committee is worked and performed by Professor Pou Temara and Mistress Turuhira Hare.
Each group is to perform what is called the; Waiata-a-tira; Whakaeke; Wero; Karanga; Haka Peruperu; Karanga and more.
The performance will take place on stage while judges of all around the country that is from Tuhoe Iwi will judge. 
Justice Souter wrote that the majority' opinion did not avoid the fundamental Sixth Amendment violation caused by judicial factfinding even though the presumption of reasonableness is merely an appellate presumption.
"Without a powerful incentive to risk reversal on the sentence, a district judge faced with evidence supporting a high subrange Guidelines sentence will do the appropriate factfinding in disparagement of the jury right and will sentence within the high subrange."
And because what "works on appeal determines what works at trial," the judge will be tempted in turn to perform judicial factfinding in violation of the Sixth Amendment.
This meant to Souter that the purpose of sentencing and the reasonableness review were fundamentally at odds. 
The DCI is also the home of the Judge Program.
DCI Judges have to develop certain abilities and get some amount of experience before being chosen to perform tasks as judge testing and head-judging professional events.
To have a measure of capability of the judges the DCI introduced five judge levels:  Level 1 (Local Judge) — Run minor tournaments and aid in major tournaments.
Level 2 (Area Judge) — Run major tournaments and aid in and tournaments, testing new Local Judges.
Level 3 (Regional Judge) — Lead teams at and tournaments, testing new Area Judges.
Level 4 (International Judge) — Head-Judge tournaments and lead regional judge community.
Level 5 (Professional Judge) — Head-Judge and tournaments, contribute to development of the judge program.
There are also two associated statuses, which are not actual judge levels.
At one end of the spectrum are the rules advisors.
The status can be achieved through an online test and shows that the person is familiar with the rules of the game.
On the other end are Emeritus Judges who are considered to have improved the program through their determined effort over a long time.
Currently there are just five Emeritus Judges.
The entire program consists of more than 4,000 active judges worldwide. 
Artistic cycling is a form of competitive indoor cycling in which athletes perform tricks (called exercises) for points on specialized, fixed-gear bikes in a format similar to ballet or gymnastics.
The exercises are performed in front of judges in five minute rounds by singles, pairs, four- or six-man teams. 
The acts who have been selected in bootcamp perform in front of a judge one more time.
Judge is usually accompanied with an guest judge who is there to help him/her make the decision of selecting the acts who will represent him and the category in the live shows.
Even though the phase is called judge's houses it's rare for the judges to have acts perform in their actual houses - usually a location is booked by the producers.