Originally Posted by nickwe21

I guess you could have the trunk door open, hit the "lock" button and then drop the key in the trunk for the key to be locked in?
I've seen it happen to a neighbor of mine but his car wasn't a crossfire so I don't know if it's possible. Guy was cleaning the inside of his vehicle, had all the doors open and by mistake pushed the "lock" button on the remote. Eventually he closed all the doors not realizing he sat down the keys on the passenger side and slammed all the doors...

To answer the OP's question though, I don't know how you would get access to the trunk without using the remote key. Would be interesting to find out!