A student who sued a soft drink giant for a $23M fighter jet

This is a very frustrating case, because while it is obviously the case that extreme hyperbole in advertising is permissible, in this specific situation, it really was not obviously nonsense. Sure, assuming that you could have a military aircraft is silly -- but selling demilitarized surplus is definitely a thing, and it is totally believable that a company as noted for over-the-top stunts as Pepsi was at that time might accept losing the cost of a demilitarized surplus jet as a reasonable advertising expense to gain market share against Coke.

But that's not how it went down. Matt Parker actually did a good write-up on this case in his book -- he talks primarily about the foolishness of asking only 7,000,000 points for the jet -- a way-too-attainable number for a prize that "good". They did eventually rewrite the ads to use a much, much higher number of points required to push the jet farther out of the realm of reason.