In article T_3vc.12682$lL1.4548@fed1read03,
Greg Campbell writes:
Peter Stickney wrote:

Naw - if it's really good, you toss a bit of grass/paper in the air
when you see the flash, measure its displacement when the shock hits
by eye, and do it in your head. While keeping ahead of the crowd, as
in "If you see me running, try to keep up."

(Worked for Ed Teller at Alamagordo. And not only was he faster than
the Data Reduction folks with all their slide rules & Analyzers, he
was more accurate, as well.)

I've read in several books that it was Fermi with the bits of paper. Of
course Teller probably stole the idea and claimed it as his own...

The misattribution was mine.
It was, in fact, Fermi. Teller was the guy in the overcoat, scarf, &
big floppy hat (He sort of looked like The Shadow). He was rather
concerned about the intensity of the flash.

--
Pete Stickney
A strong conviction that something must be done is the parent of many
bad measures. -- Daniel Webster