Blow out

Typical, there I was feeling good that I'd fixed the puncture like a pro and then pumping it back up to normal pressure and...."boom" this happens!

To be fair the wheelbarrow has been in use for about 23 years and seen some service. You can see how cracked the rubber is, just glad it didn't happen while speeding up the field with a load of manure, "Oh, the poomanity!"
So a new tyre is on it's way. Make sure you check all your vehicles for wear and pressure now.