To be gone is to be completely high
to a point of no return. You may experience a loss of short-term memory, a distorted vision of reality, complete confusion of whereabouts, and a possible chance of either being picked up by the nearest authorities
or waking up next to a member of the opposite sex that you would normally puke on-sight.
On Halloween of 2008, I drank two 24-ounce Budweisers, a 24-ounce Bud Lite, popped 3 calotapins, and 2 xanex. My friend smoked a bowl of canadian dro and probably drank some type of alcholic beverage. We, unfortunately, were gone...