How STONED Was Jackie Earle Haley?

This was on TV today and of all the times I'd seen it, I just noticed that alot of the time when the group is together Kelly/Jackie always seems to either go missing(get up and practically leave the scene) or disappear suddenly from the group altogether. He also wears those sunglasses EVERYWHERE! There only seems to be a handful of scenes where he's actually acting and speaking coherent dialogue. Also, theres the scene where the Bears arrive in Japan and he's practically using poor Engleberg as a crutch because he's stumbling around lookin' like Jim Morrison's mini-me.

'When there's no more room in Hollywood, remakes shall walk the Earth.'