@Lore: After Steke's untimely execution, you suddenly decided that you were very tired and needed a nap. Since your apartment is being fumigated, you had to make due with sleeping in one of your caskets. You decided to close the lid since the sun was so bright outside that it was giving you a headache.
You suffocate. Your caskets are so well made that not even air was able to penetrate your wooden tomb.
Something like that? XP