You sound remorseful (from your youthful indiscretions); but out of curiosity... does the "glow" splat when thwacked (with a tennis racket)? or does it immediately extinguish?
The bioluminescence stays lit for some time. For example, you can paint your face with it. With the rackets, they splatter like fireworks.
[looks at tennis racket nervously]
"I'm an adult. I will not record this incredibly-sounding phenomenon for the YouTuby viewies..."
I'll just take your word for it.
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I am forty-something, but I still always cringe when I think about that sappling I destroyed (recklessly, with my teenage-swung crowbar), just to show off to some girl...