I think the highest i've ever been was Northern Lights - i got so fucked i couldnt stop laughing, at which point i fell backwards into a FREEZING river still laughing, and just carried on and on for the rest of the day. I was laughing so much my face hurt, and i mean HURT.

Saying that though, NL isnt my favourite strain. It's one of my faves, but it's not number 1. When i smoked it it felt like my first time again.