In the 1st movie, the fembots are seducing Austin and he counters their mojo with his own.
Which leads to a Not What It Looks Like moment when Vanessa walks in on Austin in his undies. He tries to explain in a long and confusing way, while she looks on skeptically, and then...she believes him.
In the second movie we get two Austin Powers for the price of one!
The opening of the third film is an action sequence. For a comedy film, it is really exciting. On the DVD extras, we get a featurette on that sequence. The Stunt Co-ordinator says "Very rarely you would have action for a comedic film." BUT IT WAS AWESOME! Followed by many cameos which will cause anyone to gasp. We have Tom Cruise, Gwyneth Paltrow, Kevin Spacey, Danny De Vito, Brittney Spears, Quincey Jones and STEVEN SPEILBERG.
Also, in the third movie, Nigel's takedown of Dr. Evil's mooks in the submarine. He tells them exactly how he's going to do it and does it. He tells the last guy to just fall down and he obeys, because Nigel is that badass.