Spurious operation of spoilers?
As a bored pax gazing out over the wing (B737), I have noticed the speed brakes making occasional minor deployments at what seems like the wrong time e.g. just after rotation. The panel lifts no more than a few centimeters and retracts again in less than a second - I assume the flight crew are not doing this, especially a few seconds after lift off. Is it some very smart function in the aircrafts automation? Is it supposed to occur?