perl -wE 'say 1; system $^X, "-wE", q(sleep 1, say "\t$_" for 1 .. 10)
+; say 2;'
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but the second script terminates immediately, while the system command still runs in the background and can't be stopped by C-c :

perl -wE 'say 1; system q(perl -wE "sleep 1, say qq(\\t\$_) for 1 .. 1
+0" &); say 2;'
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($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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