I've done stickies as well, and even walked up to a few sonics that had people in them... "Yes I know very stupid seeing how I couldn't see in the window and how one of them i ran up to we were in live traffic, BUT at a stop light".
The one i ran up to though he joined so risk the chance of something happening to get a member? Challenge accepted.... Oh wait already done.

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Check)
Sick like a creeper in you sonic a little distance away and watch the owner of the sonic get to their car... Read the sticky, crumble it up and toss it on the ground.... *sigh* (
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Come back to my car and find another sonic parked next to me...
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Pending)
Seeing all sonic owners but maybe two or three around my age all being much older than myself... (
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Getting my buddy to buy the turbo or RS sonic... Challenge accepted!
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Pending)