You would put it in TakeDamage, ideally. Look at the TakeDamage function code in UTPawn to see how it works, especially the HitInfo. Looking at the base classes and figuring out how the experts do it is a common way of learning UnrealScript. I’d also highly recommend Mougli’s scripting tutorials found here, as he describes alot of the basic functionality of UDK:http://www.moug-portfolio.info/category/tutorials/