Spike wielding spiders

Over the weekend Mister C and I were sitting on the patio talking. Master J was around the side of the house playing. Eventually, Master J wandered near us and informed us that he had killed a spider. And of course there was a conversation...

Me: Why would you kill the spider instead of just letting it go about it's business?

MJ: Because it was looking at me like it was going to attack.

Me: What do mean "like it was going to attack"?

MJ (striking a pose with legs spread and hands up in "attack mode"): You know, it was looking at me like this, like I was it's prey.

Me: Aren't you kind of big to be spider prey?

MJ: Well it looked like it was going to attack. And you know (voice now sounding like he's reading from a book) some spiders have spikes on their legs and when they feel threatened they can throw those spikes at the eyes, mouth and nose of their attacker."

Me (trying like hell not to laugh): Where on earth did you hear that?'

MJ: In a book.

Me: Well okay, but don't kill any more spiders okay? Just leave them alone and they'll leave you alone.

MJ: Okay. But it was going to attack.

Like it's not bad enough to live in the land of scorpions and rattlesnakes, now I have to worry about spiders that throw spikes.