Recursed

Traversal

Jar

H - cHest, function call o - cOntinuation, call/cc V - Vase (Jar), continuation K - Key

fn H1(K):
  call/cc(fn (V) H2(V))
;; same as
;;  call/cc(H2)
  return K

fn H2(V):
  K = V()
  exit(K)

H1(Key())