My ones are probably:
1.they just keep on coming
2.and then there were four...
3.Watch out,there's traps about!
So what are your favourite original lemmings levels? ;)
There has already been a thread like this, even with the same topic title (just without the question mark):
http://lemmings.isamedia.org/index.php?topic=269.0
I suggest a merge of these topics, if the forum software allows for that.