what is the largest/longest redbellied snake that anyone has ever seen?...because when i was in elementary school i was garter snake catching out by my garden under this tarp that covered a flat pile of top soil, and when i lifted it up, a snake rushed out and i saw it move past my feet and i noticed that it was almost all grey/white and i thought it was a redbelly because i always find them there, but it was about 16 or 18 inches long. Now i love studying redbellies and im aware that the record is upwards of about 13 inches but i was wondering if maybe someone else has seen one this big, or do you think it was maybe some sort of color morph of a garter snake...it still baffles me to this day, and i bite my tongue in not trying to grab it