Attack of the Acorn

I was happily sitting on a bench in the shade of a few oak trees at the Flugtag Memorial in Ramstein, when this now so innocent looking acorn attacked me from above.
A strong wind came up, it became noisy in the tree tops and then my scream when the little thing hit me hard on my head....There were two witnesses on the bench next to mine, which of course was the worst part.
Should not have taken the bicycle helmet off when I sat down (yes, another attempt in cycling today).

19:30; 26,5°C