My 1st Super-O

I actually had my first (and only) super o about 10 years ago. It was not with an aneros product.
I had some form of makeshift dildo in and against a wall so it wouldn't come out. I clenched down on my pc muscles and tried to push the dildo out at the same time. Well after a minute I felt a huge wave of pleasure acroos my entire body and was shaking uncontrollably. At least a half litre of clear ejaculate flowed out like urine. I since realize this could have been a very bad experience as that much pressure pushing can lead to hernia and tearing, which has resulted in many deaths. So I haven't been able to do it since :(.
I felt that wave building yesterday with my progasm after about 3 hours of very unfocused use, but lost it when my mind wandered.
I hope to have my second soon, but I can wait, I know its worth it. I was 16 having my first and I think when my mind is a bit calmer I can pull it off easily.