For a real spit-take, though, put one of the companies that we think of today as Very Big Deals next to it for comparison. Like, say, comparing Apple's performance to RealNetworks' over the decade from 1997 to 2007:
https://www.google.com/finance?chdnp=0&chdd=0&chds=0&chdv=0&...
(I omit the last few years because AAPL has gone up so much over that period that if you include it you can't see the line for RealNetworks anymore. But check out how long it took Apple just to reach the heights Real was at in the late '90s.)
Or Adobe, all the way up to now:
https://www.google.com/finance?chdnp=0&chdd=0&chds=0&chdv=0&...
"For the ubercool interactive charts, you need to install the Adobe Flash Player"
Just seemed a bit ironic, given the topic.
People understand this at a rational level when you point it out to them, but I do wonder about the extent of the economic effect of their flawed gut-level intuitions.