Two blondes walking in the countryside one day come across some tracks on the ground, the first blonde, priding herself as a bit of an expert on these kind of matters, puts her hands on her hips, looks thoughtfully at the tracks for a moment, and states " They're buffalo tracks". The second blonde just laughs and says " Dont be silly, they are obviously not buffalo tracks, they're probably Antelope tracks"
While they are arguing fiercely about this, a train hits them.