Earlier quoted context omitted.
50W is nothing, and 500W isn’t really a sprint. For an adult male, you should be pushing 1000-2000 over 20 second sprints. Walking slightly uphill is probably more intense than a 50w bike.
50W is barely moving on a bicycle. But 500W is a significant effort for an untrained person, particularly somebody of smaller stature. FWIW, I'm an avid recreational cyclist and my 1-hour power fluctuates in the 250W-280W range at 68-70kg body weight. My all-out sprint power is over 1000W, but not by much. 2000W is enough to win elite sprints, both on the track and on the road.
But anyway, if you know who that is, you'll know that 2000 watts is not a common max output.
Edit: Ok I was a 320 watts for 20 minutes guy a few years ago, I'm probably about 250 watts for 20 minutes guy now. I just did this workout, probably in the 500-600 watt range for the 20 second surges, and it was surprisingly hard.