Crock pots don't usually explode when placed directly in a pot, but there are some cases where there is a risk of explosion. Crock pot is a kind of porcelain container can withstand high temperature, usually used for stewing food. Crock pots can withstand a certain amount of heat, but if they are not used properly during the process, the porcelain may break or explode.

First, when using a crock pot, make sure there is a layer of water on the bottom of the pot so that the heat does not act directly on the surface of the porcelain and cause it to burst.

Second, avoid excessive temperature differences. Putting a cold crock pot directly into a hot pot or putting a hot crock pot into cold water, the temperature difference is too large and may cause the porcelain to crack. Therefore, when making temperature transitions, you should heat up or cool down slowly.

In addition, crock pots that are broken or cracked increase the risk of explosion. Therefore, before using a crockpot, check for visible cracks or damage, and if there are any, it is best not to use it.

Overall, using a crock pot correctly and following the precautions outlined above will generally prevent an explosion. But in special circumstances, such as the stew pot has broken or the temperature difference is too large and other factors exist, there is a certain risk of explosion. Therefore, it is important to stay focused and make sure you are using your crock pot safely. If you feel unsafe or are unsure about how to properly use a crock pot, it's best to consult a professional or find specific instructions for use.