try not eating for a week. I've done it twice, once for fun. After a couple of days it almost fun as long as your aren't starving in the first place...
I have not eaten for a few days on occasion. It can be a great experience!
Don't eat for a couple of days, then go for a walk in the countryside, through some woodland or such like!
Your senses are so much more attuned to your surroundings! Visually things appear sharper, your hearing seems more acute. Thought processes seem accelerated. It is quite astounding! (although make sure you still drink plenty of water!)
I think it could possibly be that the primevil hunter inside gets a bit closer to the surface!
I couldn't do it now though! Too old! I can barely make it to 11am without a sit down, cup of Earl Grey and a chocolate HobNob!