Exactly like an ambulance. That Doppler effect is kool. I remember in planetary physics classes, they use it to understand how spiral galaxies rotate and how the universe expand by just observing how light emitted by this distant celestial objects shifts ( blue shift verses red shift) so I am very familiar with it.
I am very impaired in every aspect lately. Jus using a lot of mitigation strategies to help me stay sane. Doing bit better but hopefully soon