quoted by cyber-sibes
Sometimes the end of the shell will "point" up, but the bottom stays down. If they float, the eggs have gone bad - DON'T EAT THEM!

yikes!! really? everytime, everytime I just boil them right after I got them at grocery, they just always float on the sides and points too. at least I haven't died yet!

but anyway, my way - I start with cold water, boil for about 10-15 minutes until I see, what is it called, egg foams? floating up, they're ready for devil eggs!