Same batch, three different outcomes

What on earth happened here? First shell completely cracked and "exploded", no feet. Second shell expanded weirdly and also cracked, but third came out perfect (I accidentally cracked a little myself) Idk what went wrong. I usually bake them on a gas oven at 160° (320F) but today I tried 140° on a electric oven. [...]
#dining #cooking #diet #food #Macarons
https://www.diningandcooking.com/2566567/same-batch-three-different-outcomes/