A spring break trip to Costa Rica left a University of Colorado Boulder student with more than souvenirs and dirty clothes to unpack. Tucked inside her carry-on suitcase was a tiny venomous pit viper that she did not discover until she got home. What happened? According to the Daily Camera, University of Colorado Boulder sophomore Samara Kahan was going through her luggage in her sorority house after the trip. She then spotted something coiled i…