Matt Bauer was also part of a group from Cardiff running the Boston Marathon yesterday.
Pictured on the right here, with his friend Stuart Trimby, he told us he feels very lucky at having crossed the line just one minute before the explosions happened.
At least three people were killed in the blasts, and more than 100 injured.
More top news
Our Political Editor takes stock of an extraordinary week in an already extraordinary General Election campaign..
Chris Coleman said the full-back "did not want to play international football" after naming his squad for next month's World Cup qualifier.
Well it wouldn't be a Bank Holiday weekend without a drop of rain! With some sunshine thrown in!