Slovenian6474 said:
I don't know how true this is, but i figured the only difference between the shock pumps and the ones for your tires is that the shock pumps pump less volume but can handle a higher compression. Hence, they can go to 150psi and some to 300psi. A lot of tire pumps i've seen top out around 120psi. So a bigger person that needs a higher pressure would probably need to buy a shock pump. I'm rather new too the whole air shocks thing so somebody might wanna confirm or deny what i've said here.
that's about right, it'll be tough to get a foot pump to high pressure, as it's a high volume-low pressure pump.
Shock pumps are low volume-high pressure. (and you should be able to find one for ~$20.)
but if the foot pump works for the poor teenager

, use it

, but realize it won't do much high pressure as it's probably not designed for it. if the gauge goes up to 100psi, it'll hopefully continue to work.