I remember smoking a heater core in my '85 Monte Carlo. Was 2° out, so going without heat was not an option. Neither was rolling down the windows and letting the poison fog out that was blasting from the vents.
4 hours later, I was so sick I thought I was going to die! I drank half a Red Dog (new beer! had just came out that week .. and it SUCKED) at my buddy's apartment, and it hit me like a ton of bricks. One minute fine, next I couldn't lift my arm! Threw up out both ends for 20 hours non stop.
I can laugh about it now .... but it wasn't funny then, that's for sure!
Haven't been quite right since .....