# Body.blocked not working at low fps

**URL:** <https://phaser.discourse.group/t/body-blocked-not-working-at-low-fps/922>\
**Category:** Phaser 3\
**Created:** [January 24, 2019, 8:22pm UTC](https://phaser.discourse.group/t/body-blocked-not-working-at-low-fps/922 "2019-01-24T20:22:59Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![jjcapellan](https://yyz2.discourse-cdn.com/free1/user_avatar/phaser.discourse.group/jjcapellan/32/542_2.png) [@jjcapellan](https://phaser.discourse.group/u/jjcapellan)\
**Post date:** [January 25, 2019, 9:01pm UTC](https://phaser.discourse.group/t/body-blocked-not-working-at-low-fps/922/3 "2019-01-25T21:01:21Z")

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Hi @MusicMan,  
I was able to reproduce the problem with **physics.world.setFPS()**.

See the Pen [[Phaser 3] physics FPS &rt; render FPS](https://codepen.io/jjcapellan/pen/aXdVrZ/) by Juan Jose Capellan ([@jjcapellan](https://codepen.io/jjcapellan)) on [CodePen](https://codepen.io).

If the fps of the physical simulation are much higher than the fps of the render, then between rendered frames more things happen than we can see on the screen.  
But I guess a callback in the collision should work.

Regards.

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