client crashing whenever you go unconscious

[Marquesas]

Byond version: 506.1247
Computer specs: Run of the mill budget laptop:Windows 8.1, Intel core I3-4005U CPU @ 1.70 Ghz, 4.00 gb ram, 64bit operating system
Internet speed: 5mb DL speed, like 0.5-0.6 UL speed on a good day. Works just fine though seen as i'm working off the European server.

I get this lock-up literally everytime some sort of overlay happens.
-Riot smoke
-Being knocked unconscious
-Tripping balls (but this doesn't seem too bad a lock-up, v. minimal)
-Eating anima
-Being half blinded.

First off, your BYOND is old as shit, please update it. Otherwise, this is definitely not a connection issue, this is a client performance issue. See if it:
- still happens with the latest client
- happens with the webclient