Fully reentrant continuations feel a lot like time travel. In fact, I once overslept my first class because when my alarm went off and I woke up groggy, I shut

Fully reentrant continuations feel a lot like time travel. In fact, I once overslept my first class because when my alarm went off and I woke up groggy, I shut off my alarm thinking "I'll just remember my current continuation and if I oversleep I'll call it back later with an error."