in the absence of a trunk or stone to lean on, a capybara may be an option;
I have observed these two individuals do this twice;
see also
https://www.inaturalist.org/journal/nelson_wisnik/21258-the-friendly-capybara
The photo was taken by Lisa Hatfield. Lizard survived the encounter with the young cat and was released nearby. Though it may have been injured during the encounter, and during subsequent removal.
Update:
I found several of these at Cedar Bog again this year. The last one might be Hexatoma brevicornis, so if you have expertise, please D.
https://www.inaturalist.org/observations/172420801
https://www.inaturalist.org/observations/172420799
https://www.inaturalist.org/observations/172420798
https://www.inaturalist.org/observations/175243975
Note: I have photographed this Hexatomini at Cedar Bog in Champaign County, Ohio for at least 17 years. Always in the same area.
I've added two other observations; one from back in 2004.
Links to those observations:
https://www.inaturalist.org/observations/88273567
https://www.inaturalist.org/observations/84762884
Here's an observation this year (2022) with better pics of wing venation. Same location.
https://www.inaturalist.org/observations/124010854
Observed in my native garden.
There is a nest here, and about 30 individuals. They are going into the ground at a shallow level and then coming back up again. Some of them have a lot of pollen. And, there’s multiple entrances to this nest.