rocknroll, have you never taken a psychedelic?
Some people get a terrible "body load" from certain psychedelics--- they may feel like the "LSD myths" about brain bleeding or spinal poisoning are physically manifesting, "I can feel a tumor in my stomach" or "i'm dying". Of course, most of these fears are completely unfounded and turn out to be a trapped pocket of gas in the lower intestine

Many people will tell you that these types of body issues are often psychosomatic, which means that if you are in a negative mindset you will feel negativity in your body as well. The mind creates the pain.
On the other hand, "amazing bodyload" to me sounds like the tingly, skin-multiplying physical hallucination that I've gotten from 2C-E and similar drugs. One time I took 2C-E fairly late in the evening, and tried to go to bed while still tripping. I could feel each of my skin cells touching the blanket in a million different places, and there was a beautiful synaesthetic visual like the strumming of a harp each time I moved my body. I spent the rest of the night writhing around on the bed reveling in the sensations that my body could produce from simple movements.
A different time on 2C-T-7, I tried laying down and closing my eyes because the peak was coming on strong. I visualized my spine as a series of interconnected laser beams swirling around each other. As I focused on slowing my breathing, I saw the laser beams all begin to merge into a single bright line. The slower my breath got, the brighter this visual became. I couldn't maintain it for long as I burst out laughing at the incredible sensations of noise and silence that pulsed through my veins. With the laughter, my visual and physical hallucinations burst into a cacophany of light and noise, until I slowed my breathing again and centered everything.
A psychedelic that has zero effect on physical or tactile sensations would be IMO pointless.