Sky News Australia host Caleb Bond has broken down in laughter assessing some of Donald Trump’s comments taking aim at Joe Biden in what was a trainwreck debate for the US President.

At one stage Mr Trump began his answer by referencing Biden’s disjointed comments.

“I really don’t know what he said at the end of that sentence – I don’t think he knows what he said either,” Mr Trump commented.

Mr Bond reviewed the footage, bursting out in a fit of laughter.

“It doesn’t matter how many times I watched it, he just keeps getting better and better,” Mr Bond said about Donald Trump’s jibe.

“Honestly, hook it into my veins,” Mr Bond said.

“And the fallout has been incredible.”