i'm impressed by his decision to trigger by sound rather than trusting his eyes: it gave him the chance to set up a more novel shot ahead of time.

incidentally, it's pretty much the same that doc edgerton used for many of his bullet photos: you start a picture in bulb mode in a dark room and use a sound trigger and time delay to trigger a strobe based on roughly how long you expect the delay between the sound of the bullet firing and it hitting the thing you care about.

Once you have a rough window, you can spend the rest of your time fine tuning the delay for whatever effect you're going for.

now putting on my dan meyer hat, it feels like a fun exercise to determine his reaction time based on the approximate speed of the car (possibly derivable if we know the shutter speed?) anyhow, cool article.