I can understand her reaction there, a lightning strike nearby is terrifying. Several years back we had one hit in the yard a few feet from one end of the house. Even though my window was covered, and on the other side of the house, my room went solid white for a split second. The sound was less loud and more all-encompassing noise that overwhelmed the senses.
Then we discovered that lightning strikes cause EMPs to electronics that aren't shielded thoroughly. The Ethernet switch, router and UPS in the den, closest to the strike, died within minutes. (Solely from the EMP, it didn't come in the power lines.) The Ethernet switch in my room died a few weeks later. On the other hand the Roku, PS3 and TV in the den were just fine.
Boom is actually pretty accurate for a lightning strike close by.