This appears to be from an Australian runner's blog as she ran the Gold Coast Marathon in 2016:
I notice a guy running just ahead of me wearing all black and a backwards baseball cap. He's been looking around a few times when people have yelled my name, and now there's a kid by the road holding a sign with a mushroom drawn on it that says "Tap Here to Power Up." I'm suddenly feeling a bit wiped out - I have no idea why - so I dart over to tap the sign. I'd like to suddenly and effortlessly zoom off into the distance like Mario would, but of course it doesn't happen.