I had no idea what this was when I encountered it, and I was very surprised to find the inside looking like pink pudding! When I finally realized that it was a slime mold, it was still weird but not quite as unexpected!
The outside of the 'puffball' seemed like woven threads.
And this is what remained on the log when I pulled off the outside.
Looks like pink pudding inside!
The stack of cut logs where I found the slime mold. You can see the pinkish oval where the 'puffball' had been.
After taking the first photos of the slime mold, I placed the puffball on another log. Five days later, I returned to check on it. Both the 'puffball' on the remainders on the log had completely dried.