Crouch jr.?! Why did he train Harry?

[phoenixwriter]

No: HPFGUIDX 81413

Hi, thats probably my first post because there isn't much left what 
keeps me wondering. But this one does.
In GoF "Moody" did perform the imperious curse at Harry. Not only 
one he did so long till Harry could fight it off. The most 
interesting part is what "Moody" said: "They'll have trouble 
controlling you" thats after the first time as he want that Harry 
jumps on the desk. Now I wonder "Moody" do prepair Harry so that he 
is able to controll his doing. But why? 
I mean its kinda strange for a DE to do if he want please his master 
and a Potter who isn't able to controlled is for sure not a thing 
what makes Voldi happy, or? This could even lead that Harry can 
escape from Voldemort. 

Thats really what keeps me thinking. It can mean "Moody" has his own 
thing with Harry and wanted himself kill him...