In the first level of the 'Espionage!' act, Dr Snow, theres a Hidden Star hanging above a low barrier (those you need to duck under) close to the end of the stage.
I never manage to grab it and survive, I assume I have jump above the barrier but the best I managed ended up just landing on top of it and crashing. I seem to be travelling too slow to jump high enough. Is there a good tip for getting that star?