On 31 May 2004 16:34:37 -0400, James Nicoll wrote:
One should be able to tell quite a lot from the lag
between bursting into flames and the buildings around one
collapsing, as well as the apparent wide of the fireball vs
how fast one's eyes melted.

Not to mention by measuring the time it takes the flash to reach second
brightness peak, though this would only be readily noticeable in the
megaton range...

--
The butler did it.