In the past few months, we have covered plenty of interesting DIY projects for smartphone developers. The SparkFun WiFi Connected Flamethrower is also quite interesting. Nick Poole has used a SparkFun ESP8266 Thing board and a few other parts to complete this project.
As you can see in the above video, it is possible to interact with this flamethrower from a smart device. You can find all the parts and instructions here.