DLR has published a detail analysis of the bouncing of Philae during its landing on 67P Churyumov-Gerasimenko.
https://www.dlr.de/content/en/articles/news/2020/04/20201028_4_5-billion-year-old-ice-on-comet-fluffier-than-cappuccino-froth.htmlDuring the landing, Philae bounced off of a ridge that it hit, then bounced after a second surface contact and came to rest in a crevice where it operated for 2.5 days. How exactly it landed in that crevice was unknown though, and the exact location itself was only found 22 months after the landing.
What actually happened (numbers for second picture):
Philae came in from the left and hit that large boulder marked on the left of this image.
It managed to hit an edge on that boulder in such a way that it slid off over it, entering a crevice behind it filled with dust while starting a fast rotation of the lander
(1). The windmilling movement of its legs dug a channel that allowed it to fly
through that dust-filled crevice until it exited it again
(2), moving dust along with it.
Upon exiting it hit the boulder to the right, scratching off the surface and compressing the ice there 25 cm (!) deep with an imprint of the top of the lander (3), then after 3 seconds bounced back to where it hit an overhang on the first boulder
(4a) and from there bounced back against the surface with a larger impression
(4b).
This took two minutes in total. From that last contact it did one last slow bounce over 30m distance in 8 minutes until it came to rest under an overhang in the shadow to the right.
The path was found by analyzing data from the 48cm-long magnetometer boom sticking out the side of Philae, which generated data when it moved relative to the lander - i.e. with every surface contact, in different ways.
The above link also has videos of the area.
The crash bounce was fortuitious in multiple ways - in its final resting position, laying on its side, the main instrument tower on Philae did not make surface contact. However during this impact - when it made that 25 cm deep impression - it was the instrument tower that bored itself into the surface, thus allowing measurements taken during those three seconds to be reevaluated now. From it they could derive data on the porosity and tensile strength of the surface area, and in combination with data from the Rosetta orbiter on the composition of the entire comet. The impact also exposed pristine water ice.
