This is what happens when lightning strikes your sprinkler system then travels through the low-voltage wiring and ends up at the outlet where the controls are plugged in.
This is what happens when that same lightning strike doesn't stop at the first outlet and continues to effect others on the same circuit.
Scary stuff for any homeowner. Lightning strikes are rare as we all know, but the effects can be pretty damaging. If you're worried about what this happening at your house, feel free to give us a call and we'll come take a look.