Higher than yesterday?

Two nights ago I smoked a lot (like a dimes worth) with my friend and was pretty blitzed, but the next day (yesterday) I invited 2 friends over to smoke what my friend left me (half a dime) and it was hard to share that much, so we took out this really small pipe I had
http://suncoastorganics.com/site_images/woodlid150.jpg
and we had to split it evenly between us three.

Anyway long story short: the high was much stronger than when I smoked it 2 nights ago. Why is that? It's the same weed. It's been in my pocket and I sat on it a lot. I was expecting it to suck but it was so strong that I was nearly shrooming!
It was like weed from halfbaked where we all coughed like hell after the first hit. This didn't happen the first night cause we used a bong.

We were laughing so hard that one of us fell on the floor just dying!
I had to quickly unplug the rice steamer in case anything would happen to us!
We had uncontrollable laughter and we were shaking so hard it was intense. I Don't think I've ever been this high in my life! And it was all off a really small single bowl.
Why did we get so crazily baked?