There is only an instant of warning. Like when you get into a car wreck, sometimes there’s a split second when you realize it’s going to happen and your brain starts formulating what to do, but you know your perception of time is all fragged up and even though you’re thinking at a million klicks a second, you’ll never be able to get yourself to react to what you’re thinking in time and all you manage to do is yell something stupid like "drek!" There is just a faint shimmer, a hint of a solid surface, like a bubble of glass. Then I hit.