You're at the workshop, right? There should be plenty of saws in the back
In a serious note, you can try soaking the finger in warm water for a while, then try squeezing it out again. Alternatively, I've heard of iodine or isopropyl alcohol used to cause the surrounding skin to retract a bit and make it easier to get out, though I can't personally vouch for those methods.
(Please sterilize the saw before removing the finger. It will lower chance of infection)