that

thump, thump, thump
can happen as a result of rust on the rotor
from it just sitting
so there can be nothing but a little rust making that happen.
My beast is rather heavy so since i have a lead foot i always make sure it can stop
real FAST........
you never know when someone is gonna lock them up for no reason what so ever.
Had a guy yesterday pull in front of me so fast that i thought i was going to clip his rear corner and roll his car like the police do for a Runner.... good thing --->i was driving slow .......