Am I bad for what I did to my dad yesterday?

He was wiring up an unlimited voltage unit that has the potential to blow a person into pieces with the amount of electricity it can draw from the power grid... his attention focused only on the thick wires and bar... if he touches anything else it could be the last thing he ever does.

And then I start deliberately popping the bubble wrap under his tools, SNAP CRACKLE POP!!! All he hears is an ominous electrical crackling sound - the sound of impending elecrocution. He jumps, smacks his hands on the unit and ends up with a few cuts on his right hand. I laugh.

Later dad continued working, and was so nervous his palms were sweating... at the critical moment when the 2 inch thick wire and the metallic bar make contact, his phone rings and vibrates in his pocket, sending him jumping again... this time when he hangs up the phone and looks inside the machine again he whacks his head on the door because he is so frazzled...

...so am I a bad child?