High accuracy in ultrabullet?

Accurate in ultrabullet?

When you think about ultrabullet, you probably do not think of high accuracy games like a 97% accuracy game or so, but I am here to prove you wrong. Here is a 97% accuracy ultrabullet game that I won while berserking. (Berserking is when you cut your time in half for one more tourney point if you win) (game in my bookmarks)

Game

Game stats

https://lichess.org/@/RugvedHulsurkar
1 inaccuracy
0 mistakes
2 blunders
74 average centipawn loss
73% accuracy

https://lichess.org/@/Rodionkel
0 inaccuracies
0 mistakes
0 blunders
25 average centipawn loss
97% accuracy

My questions to the community

What is a centipawn loss?
Is this really the most accurate ultrabullet game?

(Please anwser these questions in the forum at the bottom of the post)