At around 7 months (can't remember exactly!) Tallon cut 5 teeth all at once. He had one little tooth at the bottom for a while, then bam, the one next to it and the top 4 came all at once. Then he cut the next 2 at the bottom together, then just 1 next to them, and now he's cutting 2 molars together. I actually loved that he cut so many at once - get it over with!