Huck's Quick Lies

I find it a little bit funny and interesting how quickly that Huck seems to be able to come up with all of these extravagant stories that somehow end up being believable when he gets into tight situations. Like, how does he come up with this stuff? Sometimes they just seem to be the first thing that pops into his mind and sometimes they actually seem perfectly logical. I also thought it was weird how Huck can get people to believe his stories even if they are not actually that realistic or believable.