Raised in a Virtual Reality chamber, Bart's not exactly an expert in distinguishing the imaginary from the genuine; particularly when it comes to life-threatening peril. He demonstrates - or rather, suffers from - a behavioural pattern Wally West likes to call the Single Synapse Disorder: Thought to deed in one nanosecond of a leap, possible consequences never crossing his mind. The moment he thinks, he does; whether it's running off before even knowing where he's supposed to go, employing the most unconventional methods to defeat his enemies or saying the darndest things that might nullify his struggling efforts to keep a secret identity. Sometimes it works out for him, sometimes it doesn't. And when you're a superhero, there's simply no room for such mistakes.

An inability to register 'danger' is not the only way his inherited power has shaped him. Bart is impatient; very, very impatient. He has to be repeatedly reminded to do things at a normal pace, otherwise he would be finished in less than a second with time for video games (And that wouldn't really help the secret identity thing, now would it?). His impatience is further evident in his inability to walk with normal people without complaining, or figure out just why fast food is 'fast'. This impatience, though not his best trait, is not unjustified, however. Bart, like many other speedsters, simply has a different perception of time. For example: To many of us, the ceiling lamp turns on at the flip of a switch. To Bart, however, it can take minutes or maybe hours if he's particularly in-tune with the Speed Force.

Bart is the poster-boy for ADHD. If you asked him what the word 'torture' meant to him, his immediate answer would be 'Keeping still and quiet'. When not under the pressure to keep his identity secret, Bart can be seen everywhere, trying out everything. Quite literally, too - if you don't have the eyes of a speedster. Concentrating on something is just something extremely hard for him. There are two possible reasons for this: One, being the fact that he may not take the task that seriously because it does not sink it as 'real' to him, and two, being the fact that his accelerated perception of time simply makes it slow and boring. Luckily for him, a dynamic job like crime-fighting does not need that much of an attention span. Now, if only high school could be the same. . .

At first glance, Bart looks like any normal teenager. He has a small stature, unruly brown hair, and big, innocent-looking golden eyes. He's quite a nice and easy-going guy - not one to hate someone or throw a tantrum over petty things. The way he speaks is very straightforward, honest and simple. The way he dresses reflects this as well, though he isn't above putting on the occasional disco outfit or dress if the situation calls for it. Despite being the most popular guy in his high school (a reputation he earned from being the most reckless, of course), he's not exactly a social butterfly. Unlike most teenagers, Bart does not actively seek a social life - he never had to in the VR chamber, after all. 'Making friends' was actually a task assigned to him by Max -- and one that, despite the lack of effort on his part, he eventually accomplished anyway. Even though he had to be asked to make friends, he truly does care about the ones he made - even the acquaintances. When Bart, as Impulse, learned that his friend Preston was being abused, he was ready to give up his secret identity and report the issue. He also kept his friend Rolly out of danger on multiple occasions.