I have a glass top desk so when they topple its is one heck of a racket. The hubby usually yells "You ok?" and I yell back "Yep I am fine it was a Crapalanche!". He gets it and he doesn't vape.Ah... many a time I've had the domino effect as well! Now I use a couple of heavy bottom candle holders for some of them and try to keep the others a few to the left and a few to the right. They still go flying but at least it's only one at a time