With mountain flying down drafts, they'll get your attention in a hurry when you're low hours and getting used to them. When you get the REAL bad one, the one that won't release you quickly, you'll find that it will let up at 300-500 AGL (hope you approached that ridge line on the 45* so you have options). Be SURE you know what you're fly in, meaning if it's VIRGA or a microburst, it may take you all the way to the ground. If you hit a dust devil landing (especially over pavement and don't see it), you'll get turned 45 degrees to the left, have had this in the flare and it's not fun. If you catch mountain wave or near rotor TB, you might get some near inverted or unintentional inverted flight ... there's not ALWAYS a lenticular to give it away.