weird way

given the file:
```
this is a test
it is only a test
if this were an actual emergency
1
2
3
4
5
```

code:
```
line=$(cat test.txt | grep -n 'this' | tail -1 | cut -d: -f 1)
cat test.txt | sed -n ${line},$(expr ${line} + 5)p
```
output:
```
if this were an actual emergency
1
2
3
4
5
```