So sometimes when I've smoked at least 1 hit out of a bowl, when I go to light it again, before I even spark the lighter I get a spark from the bowl.
That's a little bit of the flint hitting the already lit part of the bowl... If you spin the striker backwards then tap it over a lit bowl it'll spark a lot
I buy the 3 pks from the dollar store. Sometimes I have to make adjustments or overhaul them. It was interesting to discover those are not "flint" anymore. Looks like magnesium or something.