The recent night attack on an IDF camp by 18 Hamas terrorists near Khan Younis could have been catastrophic. But six of Hamas’ eight grenades failed to explode. They also blew up an empty building. The soldiers responded, quickly eliminating 10 terrorists and air support finished the job.
https://worldisraelnews.com/soldiers-attacked-by-hamas-last-week-call-survival-a-miracle/
https://unitedwithisrael.org/watch-soldiers-tefillin-remain-unscathed-after-hamas-attack/