get some more, til you have a decent amount to freeze several cans of shaving foam
put on some asbestos gloves, get some snips, freeze say 30 cans of shaving foam, freeze them, cut the frozen article out, load into someones car and wait for them to open it, it'll expand when they open it apparently.
What i've been told anywho, not that i'd actually do it, it could work out pretty funny if it wasn't your car, harsh on the other person though.
Maybe build a cooling duct and cool your processor with it?