Two finger kill. sentinel process
Code:
echo "" > /var/log/messages; showlog -f 2>/dev/null \
| awk ' $0 ~ /.*GestureEngine*./ && $6=="2" && $7=="up" {system("xdotool getactivewindow getwindowname ")} ' \
| awk ' !/L:*.|webreader|kb|pillowd/ \
{system("xdotool getactivewindow windowkill ")}'