Revealing mistake: After Art and Ray successfully blow up the Klopek's house, Ray emerges from the ruins and the porch collapses behind him. It can be seen that the porch supports are dragged backwards towards the house to allow the porch to collapse behind Ray.
Revealing mistake: When Carol suggests they introduce themselves to the Klopeks and Ray respends you can see Rick Ducummon in the background failing to stifle a laugh.
Revealing mistake: When the Klopek's house is burning and the roof starts to collapse, the "house" is really just an empty shell.
Answer: It's unlikely he could have survived in real life, or if he did, he'd be far more injured and/or permanently maimed, but this is a comedy movie, and reality is often ignored.
raywest ★