So we cook Spaghetti very frequently in our house. It's cheap, it's easy and well, tastes good (especially with baked cheese on top). Now I typically don't over fill my pot in the first place and after I place the pasta in I turn it down to 7 and let it cook. But a long time ago I didn't. I would try to wooden spoon thing and it didn't work.
One thing I found interesting is that the bubbles actually formed up around the spoon and created enough of them to spill over more.
********* Another try***