2 feet was awesome. i can see 3 being insane (next time ). 4 is a spirit walk. of course we are talking about pedro here. 2 feet of bridgesii would completely annihilate you.
3 feet pedro is awesome. Friend of mine took 6 ft; said he wanted to tear his eyes out after a few hours, I trip sat him, though, he was doing ok.
For me 2-3 feet was a very mellow trip. With mescaline there is alot less anxiety than LSD or mushrooms. I ate 10' to 12' once... I had to lay in bed all day and just listen to music and fry... I didnt want to attempt walking ALL day.. lol That was memorable