If the BATF comes to your door because they're "trying to trace a gun"
When you ask which one and they say "Colt Diamondback", you have to ask "which one?" again
When they say the nickle one, you ask if its the two inch or the four inch.
When they want to come in and see ALL your guns, you laugh heartily and hand them your RKBA attorneys card--just before stepping back inside and slamming the door.
When you show up at the local BATF office with your attorney, the agents are visibly nervouse and appear to have tripled in number.
When you are handing over your Colt revolver collection to the agents for them to verify serial numbers, you ask them to first put on cotton gloves.
Which you have provided.
When they ask why you can no longer produce the 12 Makarovs you bought at one time last November, you look at them and say: "Christmas Presents. Duh!"