A few weeks ago I had a brake pad failure at Barber. I just wanted to share it with the rest of you so you can take the necessary precautions.
What you are seeing is a brake pad failure where it seems the friction material separated from the back plate all at once causing a gap in the brakes which caused a sudden loss of brake pressure. The brake pressure came back as I got into the pits because the back plate made contact with the rotor. Luckily I didn't damage the rotor because it happened right before pit entrance.
Carbone Lorraine C44 Brake Pad Failure