She's not a big actor at all, but she was in the movie Jason X, and this scene in particular stood out. Jump to 0:40 secs and 0:43 seconds. Both happen pretty fast. It's probably worth getting a digital copy and playing it at 1/4 speed.
https://www.youtube.com/watch?v=m-5pPy7zuyc
the part where she's sitting in the background too:
(http://images6.fanpop.com/image/photos/40600000/Jason-X-a-nightmare-on-elm-street-vs-friday-the-13th-40611006-500-281.gif)
28:55 of the full movie has a really nice shot of her spine. I can't screenshot due to youtube.
1:24:11 has a really nice shot of Lexa Doig's spine
A few years late but just came across this and wow, her spine...
(https://t0.pixhost.to/thumbs/632/527399448_vlcsnap-00010.png) (https://pixhost.to/show/632/527399448_vlcsnap-00010.png) (https://t0.pixhost.to/thumbs/632/527399455_vlcsnap-00011.png) (https://pixhost.to/show/632/527399455_vlcsnap-00011.png) (https://t0.pixhost.to/thumbs/632/527399464_vlcsnap-00012.png) (https://pixhost.to/show/632/527399464_vlcsnap-00012.png) (https://t0.pixhost.to/thumbs/632/527399474_vlcsnap-00013.png) (https://pixhost.to/show/632/527399474_vlcsnap-00013.png) (https://t0.pixhost.to/thumbs/632/527399479_vlcsnap-00014.png) (https://pixhost.to/show/632/527399479_vlcsnap-00014.png) (https://t0.pixhost.to/thumbs/632/527399485_vlcsnap-00015.png) (https://pixhost.to/show/632/527399485_vlcsnap-00015.png) (https://t0.pixhost.to/thumbs/632/527399490_vlcsnap-00016.png) (https://pixhost.to/show/632/527399490_vlcsnap-00016.png) (https://t0.pixhost.to/thumbs/632/527399496_vlcsnap-00017.png) (https://pixhost.to/show/632/527399496_vlcsnap-00017.png) (https://t0.pixhost.to/thumbs/632/527399501_vlcsnap-00018.png) (https://pixhost.to/show/632/527399501_vlcsnap-00018.png) (https://t0.pixhost.to/thumbs/632/527399508_vlcsnap-00019.png) (https://pixhost.to/show/632/527399508_vlcsnap-00019.png) (https://t0.pixhost.to/thumbs/632/527399512_vlcsnap-00020.png) (https://pixhost.to/show/632/527399512_vlcsnap-00020.png) (https://t0.pixhost.to/thumbs/632/527399517_vlcsnap-00021.png) (https://pixhost.to/show/632/527399517_vlcsnap-00021.png) (https://t0.pixhost.to/thumbs/632/527399523_vlcsnap-00022.png) (https://pixhost.to/show/632/527399523_vlcsnap-00022.png) (https://t0.pixhost.to/thumbs/632/527399528_vlcsnap-00023.png) (https://pixhost.to/show/632/527399528_vlcsnap-00023.png) (https://t0.pixhost.to/thumbs/632/527399531_vlcsnap-00024.png) (https://pixhost.to/show/632/527399531_vlcsnap-00024.png) (https://t0.pixhost.to/thumbs/632/527399535_vlcsnap-00025.png) (https://pixhost.to/show/632/527399535_vlcsnap-00025.png)
And the shot of Lexa Doig's spine:
(https://t0.pixhost.to/thumbs/632/527399538_x-2024-10-29-00h53m55s431.png) (https://pixhost.to/show/632/527399538_x-2024-10-29-00h53m55s431.png)