Yes. It's from the Tiger Crane Paired Fist (Fu Hok Seung Ying Kuen), driving the ridge of the knuckles into both sides of the temples, intending to damage the skull, brain, and/or ears.
Try it on yourself. It hurts just putting the leopard fist knuckles on those points. Now imagine getting slammed on both sides (or even one). That's a very sensitive area and the skull is weak. It's definitely one of the more dangerous techniques, you can seriously injure or kill someone this way (which is probably why it's one of Wong Fei Hungs "10 Special/Killing Hands").
Here's a slightly different version.
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