My theory is that this scene takes place before they ride the Dinobots but after OP defeated Grimlock.OP says something like "The Dinobots are our allies now,they have agreed to help us.Autobots,We must ride them into battle!" and Crosshairs delivers that line while Drift is thinking "Um...these things might be useful".What do you think?
I was Crosshairs and I find out about the Dinobots I'd be perplexed too on how much stuff ended up on Earth. The Primes hid the Matrix on Earth keeping it away from the Fallen, with the Sun Harvester in Egypt. The Allspark landing on Earth with Megatron on its heels. The Ark crashing on Earth's moon and Soundwave hiding an army on it...
This is actually an out take. His next line is 'I ain't f**king doing that. Who changed the script? Yeah, well you can tell him to shove it, call my agent, I'll be in my trailer.'