My male cat is almost 2yrs old and today for the first time ever he has been meowing A LOT and it's not his normal meows. He is also staying very close to me and won't leave my side and will run a little ahead of me and then look back to see if I'm following him (he has never done this). He is mostly an outside cat. He comes home in the morning, eats, lays around for a couple hours and then back outside he goes for the day, but today he acted completely different. So after I realized he wanted me to follow him outside, I did. 

He kept running a little ahead of me making sure I'm following him and then he got to the spot where he stopped, looked at me and just started meowing while looking at me and towards the place he wanted me to go. Well the problem is he wants me to go underneath the apartments I live at and I obviously can't fit through the tiny little vents. 

So long story short I'm not sure what he wants, maybe he's trying to show me something important or maybe he's just playing around but by the way he's meowing and so persistent that I follow him it doesn't seem like he's playing. Thank you.