I came up with this example and as others have said in the comments it's the read line </dev/tty that's causing it to wait for user input.
#!/bin/bash find db -type f -name '*.jpg' -exec sh -c ' file="$0"·file="$0" echo "hi"·"hi" echo "$file" read line </dev/tty ' {} \; My script's output
hi db/db1440/gothamgardenxmas21440.jpg <---- I hit enter here hi db/db1440/unveiling11440.jpg <---- I hit enter here hi db/db1440/astronomer21440.jpg <---- I hit enter here ...