When President Clinton reminisced about his/her time in office, they had fond memories of surging Sanders. Be it in the Oval Office, or the campaign trail.
When you just cum out of nowhere in the middle of intercourse. This is often unprovoked and shocking to both parties.
I was having intercourse with my Susie 9 months ago and almost fell asleep it was so boring. Out of nowhere I had a Surging Sanders. We had to burn the whole place down.