As far as I remember both the anime and the VN don't give much detail on that scene, but in both of them it's fairly obvious that something really bad happens, if you know what I mean.
The Clannad anime is probably the best VN adaptation you'll ever watch, alongside the Steins;Gate anime. There are other good adaptations such as Kanon and Higurashi, but I haven't heard of any that are on the same level as Clannad and S;G.