this is definetly WILDing as you had all the "tell-tale" signs of WILDing(HI,SP and the strange physical side effects such as vibrations which you defined as an earthquake),sorry if these acronyms are confusing, and yea WILDing is really full on, rather exciting sometimes( I wouldn't know as I'm yet to WILD) may I ask what Reality Check you did?
If you did the hand RC check those sometimes don't work and the writing/time RC's you may not of done properly since its in such bizzare circumstances..