I've recently noticed that when I'm starting to accelerate, or when I'm braking to a stop and am at low speed, there's a loud 'clunk' noise from somewhere under the car. It seems to occur when momentum is starting to have an effect (during acceleration) or when it's no longer having an effect; you suddenly feel something shift underneath and this noise happens.
Any ideas what it could be? I'm concerned it might be something driveshaft-related!