[rml]

If you are into Lisp Machines, this talk on Symbolics by Kalman Reti (who worked there) is worth watching (1h):

https://www.youtube.com/watch?v=OBfB2MJw3qg

If you only have 15 minutes, he gives another demo here:

https://www.youtube.com/watch?v=o4-YnLpLgtk

He has another video where he does some actual hacking (smooth scrolling of sheet music for display while playing an instrument):

https://www.youtube.com/watch?v=sfgjL7EUHZ8