First Activate or before activatation of the Destruction cutscene set cust where you wish. then press pause then end run or Retry level. Now that you restarted the level you may go back into your set cust menu and goto where you just was in the last round. This can help u get into places no possible before.

For example in berlin you can use the ADSCG to get onto shadow platforms in the bar before the train destroys it . which would be otherwise impossible to get on.