This is an IRC conversation on 2011 when people asked Mark Karpeles to prove if he owned the coins on his exchange.
Start of #mtgox buffer:
Thu Jun 23 01:57:23 2011 * Now talking in #mtgox
* Topic is 'Mt.Gox - Official channel -
https://support.mtgox.com/entries/20208066-huge-bitcoin-sell-off-due-to-a-compromised-account-rollback - Official announcement in the next hours announcing time at which site will be back (at least 24h from announce). Recoveries will be processed during those 24h - Trading will resume 1h after site opening'
* Set by MagicalTux on Wed Jun 22 16:28:08
<MagicalTux> go1dfish: I'll send 424242.42424242 bitcoins from a bunch of 50kBTC addresses (and maybe on 42kBTC) to one
<MagicalTux> well, two actually
<MagicalTux> one will get the 424k, the other one will get the change
<go1dfish> ok, yeah all transactions get split that way as I understand it
<MagicalTux> ready guys? Don't come after me claiming we have no coins after that
<MagicalTux> hopefully I'll be able to work without getting too much disturbed after that~
<go1dfish> yeah, ready
<nanotube> MagicalTux: wasn't your last tx 432K btc? lost 8k?
<geist_> no
<geist_> thats just the amount someone suggested
<geist_> (the 424242)
<nanotube> ah
<MagicalTux> 42 is the answer
<go1dfish> to everything
<sixEch0> 42 is my password!
<noagendamarket> lol
<nanotube> hehe ic
<go1dfish> 42 is the solution to every block to
<mabus> wait what's going on, is he proving he has our bitcoins still?
<go1dfish> shit I just ruined the economy
<mabus> what does this help
<geist_> theres a lot of people crying wolf saying gox doesnt have their btc anymore
<wumpus> don't send them to the bitcoin eater please

<go1dfish> mabus: tux is shuffling large numbers of bitcoins to show they are still under his control
<MagicalTux> anyway, going to send to 1eHhgW6vquBY... the 424242.42424242 btc.