Okay assuming the explosion was a log cabin, possibilities include:
- Meth lab
- Jealous Brick layers
- Terrorist training - suicide vests 101
- Terrorist supply explosion
- Incarnation of John Wilkes Booth confusing log cabin with Lincoln logs.
- Average Texan arsenal accidentally exploding
- Mob hit
- Gas leak explosion
- Idiot storing fertilizer indoors
- Lady Killer's explosive expert IBS incident
- Democrat explodes while trying to sign up on Obamacare.