It also unquestionably works according to the rules of 3.5 D&D land. Which are explicitly, clearly, and repeatedly explained to be the laws of physics in the comic.
You can ready a standard action. The standard action is an interrupt and goes off PRIOR to the trigger. That's how D&D 3.x works.
You can use 10,560 commoners in a line to move an object 10 miles prior to the first guy finishing picking it up by having each snatch it out of the next guy's hands as he grabs it with a readied action. Then the last one lets it go while it's moving arbitrarily quickly, and it falls straight down and lands at his feet, because that's what happens when you grab something and then let it go which is all he has done.
You can ready an action to interrupt an attack, THAT"S WHAT THE READY ACTION IS THERE FOR! That's how it's SUPPOSED to work! Being able to do things like block lightning with a wall of force is exactly why ready is in the rules.