Hay all  :)

Today i had a flight with the C130
and at arrived airport i shut down the engines at the gate.
After that i opend the ramp and the back door all that went well.
But after i opend the cockpit window and /or the front door thay shortly stand open and closed from itself asap ?? :-/

Is that normal ? I didn´t got it to stay open ... how come  :-?
Has that to do with the engine shut down ? - but why the back doors opened  :(

Any help for that ??

cheers
Mario Görs  ;)