(For me, it's more the physicality of Rawhide, from The Adventures of Buckaroo Banzai.)

That film gets quoted with surprising frequency around my house. "Let's go back up to my office and talk about this like two reasonable beings." — "Why is there a watermelon there?" "I'll tell you later." I think it was my introduction to John Lithgow, Christopher Lloyd, and many other notable weirdos; I saw it at an impressionable age.