When I picked him (and Gemma) up from school, he told me it was really loose - and it was, just barely hanging on. However, I am a wimp and can't deal with teeth. I can handle my child vomiting, having diarrhea or bleeding - but loose teeth hanging on by a "thread" gross me out!
So, instead of heading straight home from school, we stopped to see Grandpa (the official tooth extractor of the "M" family). He was able to get Spencer's tooth very easily. Spencer said it didn't even hurt! So we returned home with his tooth safe in a zip-lock bag.