Pick sounding like slap

[Growler]

http://www.youtube.com/watch?v=hLOaOC2OiTw

In this clip in '99 by Jason Newsted, about :45 into it he's using a pick but it sounds like slapping. Is it just him hitting the strings really hard or is there more to it?

Thanks

[jenderfazz]

You can achieve a sound similar to slap by picking very hard, a bit past the end of the fretboard. The space between the fretboard and P pickup/neck J pickup seems best for it. Work on it and you'll be able to adjust your technique till it sounds the way you want it to.

[Koki]

He can't slap so he does that.
Pick sounding like slap here also:
http://www.youtube.com/watch?v=wEiiQ0kxPcA

[chaosMK]

What I like to do is make a slap sound like a pick.

[MammaryVest]

I don't know what the deal with that is...pretty cool though. Maybe something to do with Sadowsky as well?

[jsbass]

He can slap, and he gets that clangy sound by not only playing with a pick but also his low action on his bass.

[yaniv]

its quite simple,PUNISH THOSE STRINGS (muhahahaha)
the closer the strings are to the pickup,the easier it is to make it sound "slappy"