The presentation of the Ice cannot be as straightforward as handing one to a bro. You must present it in an unusual fashion. Some examples are:
If a bro is about to use the microwave, hide one in there. When he opens the microwave, he will discover, much to his chagrin, that he has been iced.
Have a bartender ice a bro for you.
Ask a bro to get something out of your back pack and when he opens it: ITS ICE TIME!
The possibilities are endless.
Each chapter of bros may have different rules, but these are the 2 that are universal.
2) If you are Iced by a fellow bro you can Ice block. When presented w/ an Ice, you pull out an Ice of your own and reverse the Ice on your bro. The ultimate Ice insult.