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My elbow is OK, and my head is so hard that it wouldnt hurt anyway
Great! But, I have to ask...if your head hit the road...is the road damaged?!

That's what would have happened if my head hits anything!

Thunder, which comes from lightening, can occur with rain or snow. It's the transfer of electrons by the falling particles that creates the differential between two areas. The 'particles can be rain, snow or golf balls. But there also needs to be some thermal lifting and that is less likely in most Winter storms. The only lifting in Winter storms is usually the cold air moving under warmer air and thus lifting it. But this kind of lifting is usually very wide-spread, not like the thermal activity in a cumulonimbus.
Of course, the 'flash' you saw could have simply been a transformer shorting out/exploding. That is usually not conducive to continued electrical service to people on that circuit! 
...or it might just have been one of those traffic cameras!!!
I'm glad you weren't seriously hurt when you fell, Jane.
Ive a police friend, who wants to see a license number from a surveillance video, without spending the money that these companies charge police depts to do this. I said I would try with Photoshop, but I just cant seem to get to see the actual numbers, too darn fuzzy, tried all the filters and enhancements.
Anybody have any experience with this and know how to do it with PS or PSE?
Its fun for me to learn how to do new stuff, and I could be a help to them for free.
Thanks,
Jane
Regarding the license plate ... I realize I'm being nosy, but you did bring it up and so I'm wondering about a lot of things:- What about the chain of custody for this evidence?
- Are you a "friend of the court", or certified to handle evidence in a criminal case?
- If not, what civil rights might have been violated in giving you access to this evidence?
- Would you be asked to testify in court?
- Is it possible that the evidence could wind up as inadmissible, thus rendering other evidence inadmissible; and possibly lead to all charges being dropped and the alleged robber going scott free?
In Oregon it would be a major problem letting a "citizen" do this work; and if it became public knowledge that you even had a copy of the photo from the police department, it would likely result in all charges being dropped. I'm really curious how MA differs.