Burts – that’s the one!
I’ve just picked up a GoPro and reckon that angle would be cool for skiing.
I have a plan involving 32mm push fit plumbing pipe and gaffer tape. An inverted ‘T’ can sit stable in the bottom of a pack, with the shaft coming up to shoulder blades and securing in the mouth of the pack (my ski pack has a shovel pocket and handle strap)
Add a 45 degree to the top and extend the boom up and back at 45 degrees from the shoulder blades up behind your head – then use a handlebar mount to fit the GoPro, pointing forward. Gaffer tape to stop the joints twisting – but then it’s easily demountable at the end of a run. Could work!