I can understand that.
The scariness of instant thunder is eclipsed (is that a pun?) by the
delayed scariness of almost no thunder.
In 2007 I was watching an approaching storm from my living room, and
the lightning was getting closer and closer. One strike I saw seemed to
be just behind a tall tree in the vicarage garden which is about 100
yards from us.
I knew that the next one was going to be close. I had all the windows
open because it was so hot and the noise of the rain/hail was very
loud. Then the rain eased off, and it became eerily quiet (relatively).
Suddenly, outside the window, there was a very bright flash accompanied
by a loud "crack", like a gunshot only about 100 times louder.
That was it.
I thought ******* hell, that was close, and looked out the window to
see if I could see any signs of damage. But everything seemed ok.
And then, after a minute or so, there was another instant flash/thunder
but this time it came from the opposite side of the house (i.e. away
from the previous direction).
The worry began after this, when I just sat there contemplating how
close the lightning strike must have been for me to hear no thunder.
There is a video of a lightning strike at Glastonbury 2009 here:-
http://youtu.be/cX7_qb95rmU (warning - includes bad language), but
the sound is longer than the one I heard, which leads me to believe the
strike was closer than that. The more I sat and thought about it, the
more panicky I became; which is completely illogical, as the threat had
receded.