let on

0After touching down at the tip of the landing ramp, Knievel gave the crowd a thumbs-up, raced his bike back and forth and popped a wheelie. 05000 01a01b01font00Watch Knievel make his jump »02font02b02a02br
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00"He took a really hard shot at the landing," said Knievel's business partner, Jeff Lowe. "But he's thrilled. We're all thrilled. He was a lot more nervous about this jump than he01b00 let on02b00." 02br
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00What's the meaning of 'let on'?02br
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00Thanks030srchttp://i.l.cnn.net/cnn/.element/img/2.0/mosaic/tabs/video.gifw16h14