If you have tight shoulders definitely give this one a go!
And all time classic mobility drill.
The butchers block
Stretches your lats, pecs and triceps.
I like to alternate between a more active position by bringing the ribs in and spine flat (just like handstand) whilst trying to push the arm pits towards the floor.
And
A more passive position where I allow the spine to arch and let the chest drop towards the floor.
10-15s in each position back and forth for multiple sets of 60s or more