Great Britain broke the women's team pursuit world record on Thursday evening by almost six seconds.
Team GB's Laura Trott, Joanna Roswell, Ciara Horne, Elinor Barker and Katie Archibald smashed the record with a time of 4:13.260 on their qualifying race.
It goes without saying that fans in the velodrome were very pleased.
As were the girls' supporters watching at home.
Woohoo! And now for Britain to smash their own world record in the finals (fingers crossed). No pressure, girls.