i had a similar problem with the brake calipers on my mtb yesterday but realized what was happening before anything exploded
i had been adjusting my calipers to get rid of a bit of rubbing on the front and forgot to tighten it back down when i went in for the night
then went for a ride with one of my sons yesterday and kept hearing this weird clunking noise fromt he front of the bike when i braked
my headset is kinda kludged together due to a too short steerer tube so i figgered i would have to adjust it when i got home

then i looked down and saw the caliper riding back and forth 1/8" on the loose bolt when i rocked the bike with the brake clamped
so i tightened the bolts down finger tight to get proper attention when i got home

sadly i forgot about it again and rode to work this morning with the caliper only finger tight
so i borrowed an allen key from the shop and went out to adjust it at lunch

anyhow

if you are not perfect like fietsbob and sometimes overlook things like that
when something starts acting funny while riding it is usually a good idea to stop for ten seconds
and check it out

a stitch in time saves twelve
(adjusted for inflation)