It seems like there is issues within your laptop / computer, I think you need to go and see someone else to get it fixed, because there is nothing else we can do for you on the forum.
You may try contacting Roblox's Support at [email protected] for further assistance with your issues.
Hio TheAlmighty_DXMine!
Check out this forum post:
https://forum.roblox.com/Forum/ShowPost.aspx?PostID=154596426
You may want to get a better computer, or a computer with a better graphics card / processor. I am unsure of how this is happening, but it definitely has something to do with the inability of your computer to render the explosion in-game.
Cheers,
UltimateGameTest