My first week living in Guatemala at 18, I met some older German kids at my Spanish school who took me out for my first Friday night living in Antigua. The last thing I remember from that night of debauchery was drinking a giant Cuba Libre out of a 2-liter Coke bottle in Antigua's quaint Parque Central with my new, European-cool friends at around 3 in the morning... then I woke up, face smashed up against my backpack, crammed into a 1980's toaster-style van with ten other unbathed backpackers, parked at "Migracíon" on the Guatemala/Honduras border. My carefree 18-year-old self was so tickled by the idea of being so drunk that I boarded a van to Honduras in the wee hours of the morning that I immediately snapped a picture. Luckily, I learned that I have an incredible ability to pack all necessities for an impromptu weekend border-hop while blackout drunk!*
*I would not advise any 18 year old girl to do the same.