Nikolai ascending to the surface

Cosmonaut Nikolai Tikhonov on his way back to Earth's surface after spending six days underground as part of ESA's CAVES course.

CAVES, an abbreviation of Cooperative Adventure for Valuing and Exercising
human behaviour and performance Skills, prepares astronauts to work safely
and effectively and solve problems as a multicultural team while exploring
uncharted areas using space procedures.