Don't leave crickets in your van when it's 6 degrees out.
Yup. I went to get the lizard his food and left it in the van. I now have a dozen frozen crickets. Looks like I need to go back to the pet store.
Edit: Apparently crickets are pretty resilient! I put the bag on the heater vent and after about 10 minutes, they started moving again and flipping over from the "dead and on my back" position.
(FYI. I've now posted three times today, so be sure to check out my other new posts as well)