Once hit in crash, vulnerable

• About to take the plunge perhaps, mixing nicotine with heroin
• Destroyed nicotine, protecting hearts at risk
• At risk, prior to a breakthrough?
• Nicotine misused outside hospital in a risky location

Wikipedia Word definitions in Wikipedia
On Thin Ice, (OTI) is a Harvard College Improvisational comedy group. Founded in 1984 by Brigit Fasolino Vucic, On Thin Ice is Harvard's oldest improv troupe. OTI currently specializes in short form improvisational comedy games in the style of Whose Line ...

Wiktionary Word definitions in Wiktionary
a. (context idiomatic English) In a dangerous, hazardous, or delicate situation; at risk.