Then the lights dimmed and St-Pierre followed, bouncing up and down in his traditional karate garb to pulsating French-language rap.

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Squatting on their perches, they spout unexpected bits of literary philosophy, then revert to hooting and bouncing up and down in comically ape-like excitement.

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"As you can see now Kinect can track features like your smile, your laugh and even the raise of your eyebrows, " Ballmer said, offering a demo of himself as a bald avatar -- his digital eyebrows bouncing up and down.

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On the final flight, however, they got tangled up and he flew off her, bouncing down brutally step after step, while it was everything she could do to catch the bannister and not follow him.

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The visitors' naivety was highlighted again as Elijah Riyong misjudged a bouncing ball on the sixth tackle, allowing Tonga to gobble up the loose ball and touch down.

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The sediment grains bouncing along the bed get pushed up the rearward-facing slope (stoss) and then avalanche down the other side (lee).

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