Even so, he would experience time as he would normally do. So the 4 hours would still pass fairly quickly. However, after coming down and landing on earth, the rest of the universe would have aged thousands of years while he would only be 4 hours old. Time is relative depending on who is doing the observing, you can't really experience it yourself any different or compress it somehow so that it's all slower. Even if the people on earth saw you rolling for that 4 hours (would actually be thousands of years for them) while riding in your spaceship approaching but never achieving the speed of light - that would only actually be dilated time, like a dilated song on Sony Vegas 9.0. It will sound like a lot slower when played, but the reality is that the song is still the same song, just played slower. - so if people would be able to see what you were doing, it would (but only from their perspective) take hundreds of years for you to blink once for example. They would basically see you in SUPER-slow motion. Almost frozen in time. All this while you would experience time exactly the same. You just can't make those subatomic particles move any slower. Isn't that is what time basically is? Entropy? The energy left off from the big bang? Just billions of particles and atoms and shit moving under the leftover energy, changing states: matter to energy, energy to matter? Just that time can move faster or slower depending on the observer. There is no such thing as absolute time.
OP, Einstein and many other scientists tried to answer your question all their life. But so far, the laws of physics tell us that your wish of slowing down time for yourself is probably not going to come true.
What you could do however to abuse the exception to the rule: take your E during math class. Better yet, make sure you have 4 consecutive math classes.
Disclaimer: This weird phenomenon is not really understood by the scientific community, where the motion of the quarks inside the protons and neutrons and the electrons and the subsequent electromagnetic and strong nuclear force seem to all slow down during math class.